Battery device, power supply and electric device

Abstract

The embodiment of the utility model provides a battery device, a power supply and a power utilization device, and belongs to the technical field of batteries, at least two battery monomer assemblies are located in a box body, the arrangement direction of the at least two battery monomer assemblies is a first direction, and each battery monomer assembly comprises at least two battery monomers. The heat exchangers are used for exchanging heat for the battery monomer assemblies, each heat exchanger is provided with a first cavity and a second cavity, at least one heat exchanger is a first heat exchanger, the first cavity and the second cavity of the first heat exchanger are communicated with each other, at least one heat exchanger is a second heat exchanger, and the second heat exchanger and the first heat exchanger are arranged in the first direction; the first cavity corresponding to the second heat exchanger, the first cavity of the first heat exchanger, the second cavity of the first heat exchanger and the second cavity corresponding to the second heat exchanger are sequentially connected in series. The flow of the heat exchange medium in the first heat exchanger and the flow of the heat exchange medium in the second heat exchanger are close, and the heat exchange medium can evenly flow between the first heat exchanger and the second heat exchanger.

Description

Technical Field

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

[0002] Batteries are being used more and more widely in daily life and industry. For example, new energy vehicles equipped with batteries are already widely used. In addition, batteries are increasingly being used in the field of energy storage.

[0003] In related technologies, the flow of heat exchange medium is uneven in different heat exchangers. Utility Model Content

[0004] To address the aforementioned technical problems, embodiments of this disclosure provide a battery device, a power supply, and an electrical device to enable the heat exchange medium to flow more uniformly within different heat exchangers.

[0005] The embodiments disclosed herein are implemented through the following technical solutions.

[0006] This disclosure provides a battery device, including:

[0007] Box;

[0008] At least two battery cell assemblies are located inside the housing, and the arrangement direction of the at least two battery cell assemblies is a first direction. Each battery cell assembly includes at least two battery cells.

[0009] A heat exchanger is used to exchange heat between the battery cell assembly. The heat exchanger has a first cavity and a second cavity. At least one of the heat exchangers is a first heat exchanger, and the first cavity and the second cavity of the first heat exchanger are interconnected. At least one of the heat exchangers is a second heat exchanger, and the second heat exchanger and the first heat exchanger are arranged along the first direction. The first cavity and the second cavity of the second heat exchanger are isolated from each other. The first cavity of the second heat exchanger, the first cavity of the first heat exchanger, the second cavity of the first heat exchanger, and the second cavity of the second heat exchanger are connected in series.

[0010] In this embodiment, since the first and second chambers of the second heat exchanger are isolated from each other, the influence of the heat exchange medium flowing back in the second chamber of the second heat exchanger on the cooling medium in the first chamber of the second heat exchanger is reduced. This allows the heat exchange medium in the first chamber of the second heat exchanger to flow well to the first chamber of the first heat exchanger, and the heat exchange medium in the second chamber of the first heat exchanger to flow well to the second chamber of the first heat exchanger. The first chambers of the second heat exchanger and the first chamber of the first heat exchanger can be connected in series, and the second chambers of the second heat exchanger and the second chamber of the first heat exchanger can be connected in series. Since the first and second chambers of the first heat exchanger are interconnected, the sequentially connected first chamber and sequentially connected second chamber can be connected in series within the first heat exchanger. This achieves sequential series connection of the first chamber of the second heat exchanger, the first chamber of the first heat exchanger, the second chamber of the first heat exchanger, and the second chamber of the second heat exchanger. The heat exchange medium flowing through the second heat exchanger almost always flows through the first heat exchanger, the flow rates of the heat exchange medium in the first and second heat exchangers are relatively close, and the heat exchange medium can flow relatively uniformly between the first and second heat exchangers.

[0011] In some embodiments, the number of the second heat exchangers is at least two, the at least two second heat exchangers are arranged along the first direction, the first cavities of the at least two second heat exchangers are connected in series, and the second cavities of the at least two second heat exchangers are connected in series.

[0012] In this embodiment, since the first cavities of at least two second heat exchangers are connected in series, and the second cavities of at least two second heat exchangers are connected in series, and the first cavities of the corresponding second heat exchangers, the first cavities of the first heat exchangers, the second cavities of the first heat exchangers, and the second cavities of the corresponding second heat exchangers are connected in series, the heat exchange medium flows through each of the sequentially connected first and second cavities. The medium flowing through any heat exchanger will also flow through the other heat exchangers, allowing the heat exchange medium to flow relatively uniformly between the first and second heat exchangers and between each of the second heat exchangers. Heat is dissipated from each corresponding battery cell assembly through at least two second heat exchangers.

[0013] In some embodiments, at least two of the battery cells in each battery cell assembly are arranged in a second direction, which intersects with the first direction. The first cavity and the second cavity both extend along the second direction, and the arrangement direction of the first cavity and the second cavity is a third direction, which intersects with the first direction and the second direction respectively.

[0014] In this embodiment of the present disclosure, at least two battery cells in each battery cell assembly are arranged in a second direction. The first cavity and the second cavity extend along the second direction, which facilitates contact between the heat exchange medium in the first cavity and the second cavity and more battery cells, thereby improving heat dissipation of the battery cell assembly. The first cavity and the second cavity are arranged along a third direction, which reduces mutual obstruction between the first cavity and the second cavity in the first direction, allowing the first cavity to dissipate heat to the corresponding battery cell assembly on both sides of the first direction, and the second cavity to dissipate heat to the corresponding battery cell assembly on both sides of the first direction.

[0015] In some embodiments, the battery device further includes a connector for connecting the first cavities of two adjacent heat exchangers in series and connecting the second cavities of two adjacent heat exchangers in series, the connector for isolating the first and second cavities of two adjacent heat exchangers, the arrangement direction of at least two battery cells in each battery cell assembly being a second direction, the second direction being intersected with the first direction, and all the connectors between two adjacent heat exchangers being located at one end of the battery cell assembly along the second direction.

[0016] In this embodiment of the disclosure, all the connectors between two adjacent heat exchangers are located at one end of the battery cell assembly along the second direction, which facilitates the connectors to connect the heat exchangers more conveniently.

[0017] In some embodiments, the connector includes at least two connecting pipes, the two ends of which are respectively connected to two adjacent heat exchangers. The first cavities of the two adjacent heat exchangers are connected through the corresponding connecting pipes, and the second cavities of the two adjacent heat exchangers are connected through the corresponding connecting pipes.

[0018] In this embodiment of the disclosure, the connector includes at least two connecting pipes, which connect the corresponding first cavity and the corresponding second cavity respectively. Each connecting pipe is independently connected to the adjacent heat exchanger, and the mutual constraints between the connecting pipes are small, allowing for a more flexible arrangement of the connecting pipes according to actual needs.

[0019] In some embodiments, all two connecting pipes between two adjacent heat exchangers are arranged at intervals along a third direction, which intersects the first direction and the second direction, respectively.

[0020] In this embodiment, the battery cell has a certain height along the third direction, and the two connecting pipes are arranged at intervals along the third direction, which helps to make full use of the space of the battery cell in the third direction to arrange the connecting pipes and improve space utilization.

[0021] In some embodiments, all the connectors between any two adjacent heat exchangers are located at one end of the battery cell assembly along the second direction, the connector located at one end of the battery cell assembly along the second direction is a first connector, and the connector located at the other end of the battery cell assembly along the second direction is a second connector. Projected along the second direction, the projection areas of the first connector and the projection areas of the second connector are arranged alternately along the first direction.

[0022] In this embodiment of the disclosure, since the projection areas of the first connector and the second connector are arranged alternately along the first direction, a corresponding accommodating space is formed between adjacent heat exchangers at the end of the battery cell assembly away from the corresponding connector along the second direction, which can provide space for the arrangement of other structures.

[0023] In some embodiments, the housing includes a mounting groove located on the outside of the housing, the mounting groove being located between two adjacent heat exchangers along the first direction, and the mounting groove being recessed into the housing.

[0024] In this embodiment of the disclosure, the housing is provided with a corresponding mounting slot, which can provide space for the arrangement of other structures.

[0025] This disclosure provides a power source including a battery device from any of the above embodiments. The battery device is used to store or provide electrical energy, and the number of battery devices is at least two, with the at least two battery devices interconnected.

[0026] In this embodiment of the disclosure, the power supply includes at least two battery devices, enabling the power supply to flexibly utilize the battery devices to supply power to the electrical device as needed.

[0027] This disclosure provides a power supply including a battery device from any of the above embodiments. The battery device is used to store or provide electrical energy. The number of battery devices is at least two, and the at least two battery devices are interconnected. The housing includes a mounting groove located on the outside of the housing. The mounting groove is located between two adjacent heat exchangers along a first direction. The mounting groove is recessed into the housing. The at least two battery devices are stacked sequentially along the extension direction of the mounting groove. The power supply also includes a support member located within the mounting groove. The support member is connected to two adjacent battery devices respectively.

[0028] In this embodiment of the present disclosure, the support members are connected to the corresponding two adjacent battery devices respectively, so that the two battery devices stacked sequentially along the extension direction of the mounting groove can be installed more firmly.

[0029] In some embodiments, the battery device further includes a connector for connecting the first cavities of two adjacent heat exchangers in series and connecting the second cavities of two adjacent heat exchangers in series, the connector for isolating the first and second cavities of two adjacent heat exchangers, the arrangement direction of at least two battery cells in each battery cell assembly being a second direction, the second direction being intersected with the first direction, all the connectors between two adjacent heat exchangers being located at one end of the battery cell assembly along the second direction, and the mounting slot being located at one end of the corresponding battery cell assembly away from the corresponding connector along the second direction.

[0030] In this embodiment of the disclosure, the space between two adjacent heat exchangers at the end opposite to the connector is fully utilized to arrange the mounting groove and the support member located in the mounting groove, thereby improving space utilization.

[0031] In some embodiments, all the connectors between any two adjacent heat exchangers are located at one end of the battery cell assembly along the second direction, the connector located at one end of the battery cell assembly along the second direction is a first connector, and the connector located at the other end of the battery cell assembly along the second direction is a second connector. Projected along the second direction, the projection areas of the first connector and the projection areas of the second connector are arranged alternately along the first direction.

[0032] In this embodiment, the projection areas of the first connector and the second connector are alternately arranged along the second direction. Correspondingly, the projection areas of the mounting slots located at one end of the battery cell assembly along the second direction and the mounting slots located at the other end of the battery cell assembly along the second direction are alternately arranged along the first direction. The support member can be evenly supported within the mounting slot. Furthermore, the first connector, the corresponding mounting slot, and the support member within the mounting slot are arranged along the first direction, and the second connector, the corresponding mounting slot, and the support member within the mounting slot are arranged along the second direction, so that the space on both sides of the battery cell assembly along the second direction can be fully utilized, improving space utilization.

[0033] This disclosure provides an electrical device, including a battery device or a power source according to any of the above embodiments, wherein the battery device and the power source are used to store or provide electrical energy. Attached Figure Description

[0034] 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:

[0035] Figure 1 This is a schematic diagram of the structure of the aircraft according to an embodiment of the present disclosure;

[0036] Figure 2 This is an exploded view of the battery device according to an embodiment of the present disclosure;

[0037] Figure 3 This is a schematic diagram of the power supply structure according to an embodiment of the present disclosure;

[0038] Figure 4 This is an assembly diagram of the battery cell assembly, heat exchanger, connector and housing according to an embodiment of the present disclosure. The diagram shows a portion of the structure of the housing.

[0039] Figure 5 This is an assembly drawing of the battery cell assembly, heat exchanger, connector and housing according to an embodiment of the present disclosure, and the cut-off position is shown in the drawing;

[0040] Figure 6 for Figure 5 Sectional view at position AA in the middle;

[0041] Figure 7 for Figure 5 Sectional view at position BB in the middle;

[0042] Figure 8 This is a schematic diagram of the structure of a single battery cell according to an embodiment of this disclosure;

[0043] Figure 9 This is a schematic diagram of the structure of the wound electrode assembly according to an embodiment of the present disclosure;

[0044] Figure 10 This is a schematic diagram of the structure of a stacked electrode assembly according to an embodiment of the present disclosure.

[0045] Explanation of reference numerals in the attached figures

[0046] 1000, Aircraft; 100, Battery Unit; 400, Housing; 401, First Housing; 402, Second Housing; 403, Mounting Slot; 500, Battery Cell; 501, Housing; 511, End Cap; 521, Shell; 502, Electrode Assembly; 512, Positive Electrode; 522, Negative Electrode; 532, Separator; 542, Straight Area; 552, Corner Area; 503, Electrode Terminal; 600, Power Supply; 700, Support Component; 1, Battery Cell Assembly; 21, First Cavity; 22, Second Cavity; 23, First Heat Exchanger; 24, Second Heat Exchanger; 31, Connecting Pipe; 32, First Connector; 33, Second Connector; 4, First Delivery Pipe; 6, Second Delivery Pipe; 5, Receiving Cavity; R1, First Direction; R2, Second Direction; R3, Third Direction. Detailed Implementation

[0047] The embodiments of the technical solutions of this disclosure will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solutions of the embodiments of this disclosure, and are therefore merely examples and should not be used to limit the scope of protection of this application.

[0048] 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 embodiments of this disclosure belong; 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 this disclosure are intended to cover non-exclusive inclusion.

[0049] In the description of the embodiments of this disclosure, technical terms such as "first," "second," and "third" 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 or secondary relationship of the indicated technical features. In the description of the embodiments of this disclosure, "a plurality of" means two or more, unless otherwise explicitly defined.

[0050] 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 disclosure. 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.

[0051] In the description of the embodiments of this disclosure, 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, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects are in an "or" relationship.

[0052] In the description of the embodiments of this disclosure, 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. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0053] In the description of the embodiments of this disclosure, unless otherwise expressly specified and limited, the technical term "contact" should be interpreted broadly, and can be direct contact, contact through an intermediate medium layer, contact between two contacting parties with substantially no interaction force, or contact between two contacting parties with interaction force.

[0054] In related technologies, the battery device includes battery cell modules and heat exchangers for exchanging heat between the battery cell modules. There are at least two heat exchangers, each with a first chamber and a second chamber that are interconnected. A water supply pipe branches into at least two branches, supplying water to the first chamber of the corresponding heat exchanger. Water entering the first chamber flows into the second chamber, which is connected to the first chamber. Water from the second chamber exits the heat exchanger and flows through a branch corresponding to the heat exchanger to the return water pipe. All heat exchangers are connected in parallel. Because the water supply is relatively abundant near the inlet of the water supply pipe, the flow rate of the heat exchanger near the inlet is relatively large. For heat exchangers far from the inlet of the water supply pipe, the flow rate is relatively small because some cooling water is diverted from the preceding heat exchangers. Therefore, the flow of the heat exchange medium is uneven within the different heat exchangers.

[0055] The flow rate of a heat exchanger is the amount of fluid flowing through the effective cross-section of the heat exchanger per unit time.

[0056] In this embodiment of the present disclosure, the first cavity of the second heat exchanger, the first cavity of the first heat exchanger, the second cavity of the first heat exchanger, and the second cavity of the second heat exchanger are connected in series. The heat exchange medium flowing through the second heat exchanger will almost always flow through the first heat exchanger. The flow rates of the heat exchange medium in the first heat exchanger and the second heat exchanger are relatively close, and the heat exchange medium can flow relatively evenly between the first heat exchanger and the second heat exchanger.

[0057] The series-connected heat exchanger scheme of the present disclosure can be used in battery devices, power supplies including multiple battery devices, and electrical appliances.

[0058] This disclosure provides an electrical device; please refer to [link / reference]. Figure 1 The electrical device includes a battery device or a power source, which is used to store or provide electrical energy.

[0059] In some embodiments, the power supply device also includes a device body, and a battery device is mounted on the device body to supply power to the device body.

[0060] Electrical devices are devices that use electrical energy as their energy source to perform corresponding functions by consuming electrical energy. For example, electrical devices can be, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0061] The main body of a device refers to the main structure that consumes electrical energy to perform its corresponding functions. For example, an electrical device can be a mobile phone, where the main body is the part that enables communication and other functions, powered by individual battery cells or battery packs. Similarly, an electrical device can be a car, where the main body is the part that provides seating and allows the vehicle to move on the road, powered by individual battery cells or battery packs.

[0062] The following description will be based on an example of an aircraft 1000 as the electrical device in an embodiment of this disclosure.

[0063] Please see Figure 1 The aircraft 1000 has a power supply 600 or a battery device 100 internally. The power supply 600 includes at least two battery devices 100, which can be located at the bottom, nose, or tail of the aircraft 1000. The battery devices 100 can be used to power the aircraft 1000; for example, they can serve as the operating power source for the aircraft 1000. The battery devices 100 can meet the power needs of the aircraft 1000 during startup, navigation, and operation.

[0064] In this embodiment of the disclosure, the battery device 100 can not only serve as the operating power source for the aircraft 1000, but also as the driving power source for the aircraft 1000, replacing or partially replacing fuel or natural gas to provide driving power for the aircraft 1000.

[0065] In some embodiments, the battery device 100 may be a battery pack.

[0066] In some embodiments, the battery device 100 may be an energy storage device.

[0067] The battery device 100 of this disclosure includes a battery cell assembly, which includes battery cells 500. The battery cells 500 are used to store or provide electrical energy.

[0068] The battery device 100 corresponds to one or at least two battery cell assemblies, which are used to provide voltage and capacity. A battery cell assembly may include at least two battery cells, which are connected in series, parallel, or mixed connections via a busbar.

[0069] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0070] As an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form an independent module. As another example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0071] In this embodiment of the disclosure, the battery cell 500 can be a secondary battery, which refers to a battery cell 500 that can be used again after being discharged by recharging to activate the active materials.

[0072] The battery cell 500 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 this disclosure does not limit it.

[0073] The battery cell 500 includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator, with the separator disposed between the negative and positive electrodes. During the charging and discharging process of the battery cell 500, active ions (e.g., lithium ions) repeatedly insert and extract between the positive and negative electrodes. The separator, disposed between the positive and negative electrodes, prevents short circuits between the positive and negative electrodes while allowing active ions to pass through. In some embodiments, the positive electrode can 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.

[0074] 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.

[0075] As an example, the positive current collector can be a metal foil, a conductive polymer material, a carbon material, or a composite current collector. For example, as a metal foil, pure metals, alloys, or surface-treated metals can be used, including but not limited to stainless steel, copper, aluminum, nickel, titanium, or silver. 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 alloys, nickel, nickel alloys, titanium, titanium alloys, silver, and silver alloys, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0076] 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, the embodiments of this disclosure are not limited to these materials, and other conventional materials that can be used as battery positive electrode active materials may also be used. These positive electrode active materials may be used alone or in combination of two or more. Examples of lithium phosphate may include, but are not limited to, at least one of lithium iron phosphate (such as LiFePO4 (also referred to as LFP)), lithium iron phosphate and carbon composites, lithium manganese phosphate (such as LiMnPO4), lithium manganese phosphate and carbon composites, lithium iron manganese phosphate, and lithium iron manganese phosphate and carbon composites. Examples of lithium transition metal oxide may include, but are not limited to, lithium cobalt oxide (such as LiCoO2), lithium nickel oxide (such as LiNiO2), lithium manganese oxide (such as LiMnO2, LiMn2O4), lithium nickel cobalt oxide, lithium manganese cobalt oxide, lithium nickel manganese oxide, and lithium nickel cobalt manganese oxide (such as LiNi). 1 / 3 Co 1 / 3Mn 1 / 3 O2 (also known as NCM) 333 LiNi 0.5 Co 0.2 Mn 0.3 O2 (also known as NCM) 523 LiNi 0.5 Co 0.25 Mn 0.25 O2 (also known as NCM) 211 LiNi 0.6 Co 0.2 Mn 0.2 O2 (also known as NCM) 622 LiNi 0.8 Co 0.1 Mn 0.1 O2 (also known as NCM) 811 ), lithium nickel cobalt aluminum oxide (such as LiNi) 0.8 Co 0.15 Al 0.05 At least one of O2 and its modified compounds. Modified compounds refer to substances obtained by modification methods such as doping or coating based on the above-mentioned substances.

[0077] In some embodiments, please refer to Figure 2 The battery device 100 also includes a housing 400, and individual battery cells 500 are installed inside the housing 400.

[0078] In some embodiments, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0079] As an example, the negative electrode current collector can be a metal foil, a conductive polymer material, a carbon material, or a composite current collector. For example, as a metal foil, pure metals, alloys, or surface-treated metals can be used, including but not limited to stainless steel, copper, aluminum, nickel, titanium, or silver. 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 alloys, nickel, nickel alloys, titanium, titanium alloys, silver, and silver alloys, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0080] 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.

[0081] 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.

[0082] As an example, the negative electrode active material may be a negative electrode active material known in the art for use in battery cell 500. 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. Silicon-based materials may be selected from at least one of elemental silicon, silicon oxide compounds, silicon-carbon composites, silicon-nitrogen composites, and silicon alloys. Tin-based materials may be selected from at least one of elemental tin, tin oxide compounds, and tin alloys. However, the embodiments disclosed herein are not limited to these materials, and other conventional materials that can be used as negative electrode active materials for battery cell 500 may also be used. These negative electrode active materials may be used alone or in combination of two or more.

[0083] In some embodiments, the negative electrode can be made of 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 negative electrode, the surface of the foamed metal may or may not contain a negative electrode active material.

[0084] In some embodiments, the negative electrode may be made of foamed carbon.

[0085] As an example, negative electrode active materials can be filled or / and deposited within the negative electrode current collector.

[0086] In some embodiments, the positive current collector can be made of aluminum, and the negative current collector can be made of copper.

[0087] In some embodiments, the electrode assembly further includes an isolator disposed between the positive and negative electrodes.

[0088] In some embodiments, the separator is a separator membrane. This disclosure does not impose any particular limitation on the type of separator membrane; any known porous separator membrane with good chemical and mechanical stability can be selected.

[0089] As an example, the main material of the separator can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramic. The separator can be a single-layer film or a multi-layer composite film, without particular limitation. When the separator is a multi-layer composite film, the materials of each layer can be the same or different, without particular limitation. The separator can be a single component located between the positive and negative electrodes, or it can be attached to the surfaces of the positive and negative electrodes. An inorganic particle coating, an organic particle coating, or an organic / inorganic composite coating can also be applied to the surface of the separator.

[0090] In some embodiments, the separator is a solid electrolyte. The solid electrolyte is disposed between the positive and negative electrodes, serving both to transport ions and to isolate the positive and negative electrodes.

[0091] In some embodiments, the battery cell 500 also includes an electrolyte, which acts as a conductor of ions between the positive and negative electrodes. This disclosure 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.

[0092] Liquid electrolytes include electrolyte salts and solvents.

[0093] In some embodiments, the electrolyte salt may be selected from at least one of lithium hexafluorophosphate, lithium tetrafluoroborate, lithium perchlorate, lithium hexafluoroarsenate, lithium bis(fluorosulfonyl)imide, lithium bis(trifluoromethanesulfonyl)imide, lithium trifluoromethanesulfonate, lithium difluorophosphate, lithium difluorooxalate borate, lithium dioxalate borate, lithium difluorodioxalate phosphate, and lithium tetrafluorooxalate phosphate.

[0094] In some embodiments, the solvent may be selected from at least one of ethylene carbonate, propylene carbonate, methyl ethyl carbonate, diethyl carbonate, dimethyl carbonate, dipropyl carbonate, methyl propyl carbonate, ethyl propyl carbonate, butyl carbonate, fluoroethylene carbonate, methyl formate, methyl acetate, ethyl acetate, propyl acetate, methyl propionate, ethyl propionate, propyl propionate, methyl butyrate, ethyl butyrate, 1,4-butyrolactone, sulfolane, dimethyl sulfone, methyl ethyl sulfone, and diethyl sulfone. The solvent may also be an ether solvent. Ether solvents may include one or more of ethylene glycol dimethyl ether, ethylene glycol diethyl ether, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, 1,3-dioxolane, tetrahydrofuran, methyl tetrahydrofuran, diphenyl ether, and crown ethers.

[0095] In some embodiments, the electrolyte may optionally include additives. For example, additives may include negative electrode film-forming additives, positive electrode film-forming additives, and additives that can improve certain performance of the battery cell 500, such as additives that improve the overcharge / fast charge performance of the battery cell 500, additives that improve the high-temperature performance of the battery cell 500, additives that improve the low-temperature performance of the battery cell 500, etc.

[0096] The gel electrolyte includes a polymer as a backbone network and can be used in conjunction with an ionic liquid-lithium salt.

[0097] Solid electrolytes include polymer solid electrolytes, inorganic solid electrolytes, and composite solid electrolytes.

[0098] As an example, the polymers of polymeric solid electrolytes may include polyethers (polyoxyethylene), polysiloxanes, polycarbonates, polyacrylonitrile, polyvinylidene fluoride, polymethyl methacrylate, monoionic polymers, polyionic liquids, cellulose, etc.

[0099] As an example, inorganic solid electrolytes can be one or more of the following: oxide solid electrolytes (crystalline perovskite, sodium superconducting ion conductor, garnet, amorphous LiPON thin film), sulfide solid electrolytes (crystalline lithium superconducting ion conductor (lithium germanium phosphorus sulfide, silver sulfide germanium ore), amorphous sulfides), halide solid electrolytes, nitride solid electrolytes, and hydride solid electrolytes.

[0100] As an example, composite solid electrolytes are formed by adding inorganic solid electrolyte fillers to polymer solid electrolytes.

[0101] The electrode assembly can be a wound structure, a stacked structure, or a hybrid structure of wound and stacked.

[0102] In some implementations, the electrode assembly is a wound structure. The positive and negative electrode sheets are wound into a wound structure.

[0103] In some implementations, the electrode assembly is a stacked structure.

[0104] As an example, multiple positive and negative electrodes can be set, and multiple positive and multiple negative electrodes can be stacked alternately.

[0105] 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.

[0106] As an example, both the positive and negative electrode plates are folded to form multiple stacked folded segments.

[0107] As an example, multiple separators can be provided, each positioned between any adjacent positive or negative electrode plates.

[0108] As an example, the separators can be continuously arranged, either by folding or rolling between any adjacent positive or negative electrode plates.

[0109] In some embodiments, the electrode assembly can be cylindrical, flat, or polygonal, etc.

[0110] 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.

[0111] In some embodiments, please refer to Figure 2 The battery device 100 also includes a housing 400, and individual battery cells 500 are installed inside the housing 400.

[0112] As an example, the housing 400 may include a first housing 401 and a second housing 402. The first housing 401 and the second housing 402 are fastened together to form a closed space inside the housing 400 to house the battery cell assembly. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first housing 401 may be a top cover or a bottom plate.

[0113] For the battery device 100 of this disclosure embodiment, please refer to [link to relevant documentation]. Figures 4-7 The battery device 100 includes a housing 400, at least two battery cell assemblies 1, and a heat exchanger. The battery cell assemblies 1 are located within the housing 400. The arrangement direction of the at least two battery cell assemblies 1 is a first direction R1, and each battery cell assembly 1 includes at least two battery cells 500. The heat exchanger is used to exchange heat with the battery cell assemblies 1. The heat exchanger has a first cavity 21 and a second cavity 22. At least one heat exchanger is a first heat exchanger 23, whose first cavity 21 and second cavity 22 are interconnected. At least one heat exchanger is a second heat exchanger 24, which is arranged along the first direction R1 with the first heat exchanger 23. The first cavity 21 and second cavity 22 of the second heat exchanger 24 are isolated from each other. The first cavity 21 of the second heat exchanger 24, the first cavity 21 of the first heat exchanger 23, the second cavity 22 of the first heat exchanger 23, and the second cavity 22 of the second heat exchanger 24 are connected in series.

[0114] The first chamber 21 and the second chamber 22 of the first heat exchanger 23 are interconnected, and the heat exchange medium can flow directly from the first chamber 21 of the first heat exchanger 23 to the second chamber 22 of the same first heat exchanger 23.

[0115] The first chamber 21 and the second chamber 22 of the second heat exchanger 24 are isolated from each other. For the same second heat exchanger 24, the heat exchange medium can hardly flow directly from the first chamber 21 to the second chamber 22 of the same second heat exchanger 24. However, the heat exchange medium in the first chamber 21 of the second heat exchanger 24 can flow indirectly to the second chamber 22 of the same second heat exchanger 24 through the first heat exchanger 23.

[0116] The housing 400 is a structure mainly used to house and protect the battery cell assembly 1.

[0117] The battery device 100 stores or provides electrical energy through the battery cells 500.

[0118] The heat exchanger is used to exchange heat with the battery cell assembly 1. The battery cells 500 in the battery cell assembly 1 generate heat during operation or need to be heated under low temperature conditions. The heat exchanger exchanges heat with the battery cells 500 so that the battery cells 500 in the battery cell assembly 1 can work under suitable conditions.

[0119] For example, please refer to Figure 7 The first chamber 21 and the second chamber 22 of the first heat exchanger 23 are connected through the opening of the first heat exchanger 23 away from the end of the corresponding connector along the second direction R2.

[0120] For example, a heat exchanger is provided between two adjacent battery cell assemblies 1.

[0121] For example, each heat exchanger is located between two adjacent heat exchangers.

[0122] For example, the number of battery cell assemblies 1 between each pair of adjacent heat exchangers is two.

[0123] For example, the battery cell assembly 1 and the heat exchanger are arranged alternately along the first direction R1. A heat exchanger is disposed between every two adjacent battery cell assemblies 1, and a battery cell assembly 1 is disposed between every two adjacent heat exchangers.

[0124] In this embodiment, since the first chamber 21 and the second chamber 22 of the second heat exchanger 24 are isolated from each other, the influence of the heat exchange medium flowing back in the second chamber 22 of the second heat exchanger 24 on the cooling medium in the first chamber 21 of the second heat exchanger 24 is reduced. This allows the heat exchange medium in the first chamber 21 of the second heat exchanger 24 to flow well to the first chamber 21 of the first heat exchanger 23, and the heat exchange medium in the second chamber 22 of the first heat exchanger 23 to flow well to the second chamber 22 of the first heat exchanger 23. The first chamber 21 of the second heat exchanger 24 and the first chamber 21 of the first heat exchanger 23 can be connected in series, and the second chamber 22 of the second heat exchanger 24 and the second chamber 22 of the first heat exchanger 23 can be connected in series. Since the first chamber 21 and the second chamber 22 of the first heat exchanger 23 are interconnected, the first chamber 21 and the second chamber 22 connected in series can be connected in series within the first heat exchanger 23. This results in the first chamber 21 of the second heat exchanger 24, the first chamber 21 of the first heat exchanger 23, the second chamber 22 of the first heat exchanger 23, and the second chamber 22 of the second heat exchanger 24 being connected in series. The heat exchange medium flowing through the second heat exchanger 24 will almost all flow through the first heat exchanger 23. The flow rates of the heat exchange medium in the first heat exchanger 23 and the second heat exchanger 24 are relatively close, and the heat exchange medium can flow relatively evenly between the first heat exchanger 23 and the second heat exchanger 24.

[0125] In some embodiments, please refer to Figure 4 and Figure 5 The number of the second heat exchangers 24 is at least two, the at least two second heat exchangers 24 are arranged along the first direction R1, the first chambers 21 of the at least two second heat exchangers 24 are connected in series, and the second chambers 22 of the at least two second heat exchangers 24 are connected in series.

[0126] For example, in all heat exchangers, there is one first heat exchanger 23 and at least two second heat exchangers 24. The first chambers 21 of all second heat exchangers 24 are connected in series, and the first chambers 21 of all second heat exchangers 24 are connected upstream of the first chamber 21 of the first heat exchanger 23. The second chambers 22 of all second heat exchangers 24 are connected in series, and the second chambers 22 of all second heat exchangers 24 are connected downstream of the second chamber 22 of the first heat exchanger 23. The heat exchange medium flows sequentially through the first chambers 21 of each second heat exchanger 24 and then flows to the first chamber 21 of the first heat exchanger 23. The heat exchange medium in the first chamber 21 of the first heat exchanger 23 flows to the second chamber 22 of the first heat exchanger 23. The heat exchange medium in the second chamber 22 of the first heat exchanger 23 flows sequentially through the second chambers 22 of the second heat exchangers 24 and then flows out of the battery device 100.

[0127] For example, the number of first heat exchangers 23 can be at least two, the first chambers 21 of at least two first heat exchangers 23 are connected in series or in parallel, and the second chambers 22 of at least two first heat exchangers 23 are connected in series or in parallel.

[0128] For example, the battery device 100 also includes a first delivery pipe 4 and a second delivery pipe 6. Among all the second heat exchangers 24, the second heat exchanger 24 that is farthest from the first heat exchanger 23 along the first direction R1 is connected to the first delivery pipe 4 and the second delivery pipe 6 respectively. The first delivery pipe 4 is connected to the first cavity 21 and the second delivery pipe 6 is connected to the second cavity 22.

[0129] For example, the first delivery pipe 4 is an inlet pipe and the second delivery pipe 6 is an outlet pipe.

[0130] In this embodiment, since the first chambers 21 of at least two second heat exchangers 24 are connected in series, and the second chambers 22 of at least two second heat exchangers 24 are connected in series, and the first chambers 21 of the second heat exchangers 24, the first chambers 21 of the first heat exchangers 23, the second chambers 22 of the first heat exchangers 23, and the second chambers 22 of the second heat exchangers 24 are connected in series, the heat exchange medium flows through each of the sequentially connected first chambers 21 and second chambers 22. The medium flowing through any heat exchanger will also flow through the other heat exchangers, allowing the heat exchange medium to flow relatively uniformly between the first heat exchangers 23 and the second heat exchangers 24, and among the second heat exchangers 24. Heat is dissipated from each corresponding battery cell assembly 1 through at least two second heat exchangers 24.

[0131] It is understood that the number of second heat exchangers 24 is not limited. For example, the number of second heat exchangers 24 can be one.

[0132] In some embodiments, please refer to Figures 5-7 In each of the battery cell assembly 1, at least two of the battery cells 500 are arranged in a second direction R2, which intersects with the first direction R1. The first cavity 21 and the second cavity 22 both extend along the second direction R2. The first cavity 21 and the second cavity 22 are arranged in a third direction R3, which intersects with the first direction R1 and the second direction R2 respectively.

[0133] For example, a third party is arranged in the vertical direction to R3.

[0134] For example, please refer to Figure 8The battery cell 500 includes a housing 501, electrode terminals 503 and electrode assembly 502. The electrode assembly 502 is located inside the housing 501, and the electrode terminals 503 are electrically connected to the electrode assembly 502.

[0135] For example, please refer to Figure 8 The outer casing 501 includes an end cap 511 and a housing 521. The end cap 511 covers the housing 521 and is connected to the housing 521.

[0136] For example, the end cap 511 is welded to the housing 521.

[0137] For example, please refer to Figure 9 and Figure 10 The electrode assembly 502 includes a positive electrode 512, a negative electrode 522 and an insulating member 532, with the insulating member 532 disposed between the positive electrode 512 and the negative electrode 522.

[0138] For example, please refer to Figure 9 and Figure 10 The electrode assembly 502 has a flat region 542, and the positive electrode 512 and negative electrode 522 are arranged in the flat region 542 along a first direction R1. The large surface of the battery cell 500 is arranged intersecting the first direction R1, and the battery cell 500 releases more heat at its large surface. The battery cell assembly 1 and the heat exchanger are arranged along the first direction R1, so that the large surface of the battery cell 500 in the battery cell assembly 1 faces the heat exchanger, which is beneficial for the heat exchanger to dissipate heat from the battery cell 500.

[0139] The "large surface" refers to the surface with the largest area in a single battery cell (500 cells).

[0140] For example, the large surface of the battery cell 500 is perpendicular to the first direction R1.

[0141] For example, please refer to Figure 9 The positive electrode 512, the negative electrode 522 and the separator 532 are wound together into a wound structure. The electrode assembly 502 is a wound electrode assembly. The electrode assembly 502 also has a corner area 552. Corner areas 552 are provided on both sides of the straight area 542. The arrangement direction of the corner areas 552 on both sides is intersected with the first direction R1. The corner areas 552 on both sides are arranged along the second direction R2.

[0142] For example, electrode terminals 503 and electrode assemblies 502 are arranged along a third direction R3.

[0143] For example, the first direction R1 and the second direction R2 are perpendicular. The third direction R3 is perpendicular to both the first direction R1 and the second direction R2.

[0144] For example, please refer to Figure 10The positive electrode 512, the negative electrode 522, and the separator 532 are stacked into a laminated structure. The electrode assembly 502 is a laminated electrode assembly.

[0145] In this embodiment of the present disclosure, at least two battery cells 500 in each battery cell assembly 1 are arranged in a second direction R2. The first cavity 21 and the second cavity 22 extend along the second direction R2, which facilitates contact between the heat exchange medium in the first cavity 21 and the second cavity 22 and more battery cells 500, thereby improving heat dissipation of the battery cell assembly 1. The first cavity 21 and the second cavity 22 are arranged along a third direction R3, which reduces mutual obstruction between the first cavity 21 and the second cavity 22 in the first direction R1, so that the first cavity 21 can dissipate heat to the corresponding battery cell assembly 1 on both sides of the first direction R1, and the second cavity 22 can dissipate heat to the corresponding battery cell assembly 1 on both sides of the first direction R1.

[0146] It is understood that the arrangement of the first cavity 21 and the second cavity 22 is not limited. For example, the first cavity 21 and the second cavity 22 can be arranged along the first direction R1.

[0147] In some embodiments, please refer to Figure 4 and Figure 5 The battery device 100 also includes connectors for connecting the first chambers 21 of two adjacent heat exchangers in series and connecting the second chambers 22 of two adjacent heat exchangers in series. The connectors are also used to isolate the first chambers 21 and the second chambers 22 of two adjacent heat exchangers. At least two battery cells 500 in each battery cell assembly 1 are arranged in a second direction R2, which is intersected with the first direction R1. All connectors between two adjacent heat exchangers are located at one end of the battery cell assembly 1 along the second direction R2.

[0148] The connector is used to connect the first chambers 21 of two adjacent heat exchangers in series and to connect the second chambers 22 of two adjacent heat exchangers in series. The connector has different channels, one channel connecting the first chambers 21 of two adjacent heat exchangers in series and the other channel connecting the second chambers 22 of two adjacent heat exchangers in series. In the two adjacent heat exchangers, the medium in the first chamber 21 of one heat exchanger flows to the first chamber 21 of the other heat exchanger through the corresponding channel of the connector. Similarly, in the two adjacent heat exchangers, the medium in the second chamber 22 of one heat exchanger flows to the second chamber 22 of the other heat exchanger through the corresponding channel of the connector.

[0149] The connector is used to isolate the first chamber 21 and the second chamber 22 of two adjacent heat exchangers. That is, in two adjacent heat exchangers, the heat exchange medium in the first chamber 21 of one heat exchanger flows directly to the first chamber 21 of the other heat exchanger via the corresponding channel of the connector, but the heat exchange medium in the first chamber 21 does not flow directly to the second chamber 22 via the connector. Before flowing to the first chamber 21 of the first heat exchanger 23, the heat exchange medium in the first chamber 21 of the second heat exchanger 24 flows directly to the first chamber 21 and not directly to the second chamber 22. Isolation of the first chamber 21 and the second chamber 22 of the two adjacent heat exchangers allows the heat exchange medium in the first chamber 21 of the second heat exchanger 24 to flow indirectly to the second chamber 22. For example, the heat exchange medium in the first chamber 21 of the second heat exchanger 24 flows indirectly to the second chamber 22 of the first heat exchanger 23 and the second chamber 22 of the second heat exchanger 24 via the connector and the first chamber 21 of the first heat exchanger 23.

[0150] Exemplarily, all the connectors between some of the two adjacent heat exchangers are located at one end of the battery cell assembly 1 along the second direction R2. All the connectors between some of the two adjacent heat exchangers are distributed at both ends of the battery cell assembly 1 along the second direction R2.

[0151] For example, all the connectors between any two adjacent heat exchangers are located at one end of the battery cell assembly 1 along the second direction R2.

[0152] In this embodiment of the disclosure, all the connectors between two adjacent heat exchangers are located at one end of the electrode assembly 502 along the second direction R2, which facilitates the connectors to connect the heat exchangers more conveniently.

[0153] It is understood that the specific arrangement of the connectors is not limited. Exemplarily, all the connectors between two adjacent heat exchangers are distributed at both ends of the battery cell assembly 1 along the second direction R2. Exemplarily, a connector portion is located at one end of the battery cell assembly 1 along the second direction R2, and a connector portion is located at the other end of the battery cell assembly 1 along the second direction R2.

[0154] In some embodiments, please refer to Figures 4-6 The connector includes at least two connecting pipes 31, with each end of the connecting pipe 31 connected to two adjacent heat exchangers. The first chambers 21 of the two adjacent heat exchangers are connected through the corresponding connecting pipes 31, and the second chambers 22 of the two adjacent heat exchangers are connected through the corresponding connecting pipes 31.

[0155] For example, the connecting pipe 31 can be a bellows.

[0156] For example, the connecting pipe 31 can be a flexible hose.

[0157] For example, the connector tubes 31 are arranged at intervals.

[0158] For example, the number of connecting tubes 31 is not limited, and the number of connecting tubes 31 can be two or more.

[0159] In this embodiment of the present disclosure, the connector includes at least two connecting pipes 31, which respectively connect the corresponding first cavity 21 and the corresponding second cavity 22. Each connecting pipe 31 is independently connected to the adjacent heat exchanger, and the mutual constraints between the connecting pipes 31 are small, so the connecting pipes 31 can be arranged more flexibly according to actual needs.

[0160] It is understood that the specific structure of the connector is not limited. For example, the connector can be a single-piece structure, forming at least two channels within the connector for connecting the corresponding first cavity 21 in series or connecting the corresponding second cavity 22 in series, respectively.

[0161] In some embodiments, please refer to Figures 4-6 All two connecting pipes 31 between two adjacent heat exchangers are arranged at intervals along a third direction R3, and the third direction R3 is arranged to intersect the first direction R1 and the second direction R2 respectively.

[0162] For example, the battery cell 500 includes a housing 501, an electrode assembly 502 located within the housing 501, and an electrode terminal 503 electrically connected to the electrode assembly 502. The electrode assembly 502 and the electrode terminal 503 are arranged along a third direction R3.

[0163] For example, the first direction R1 and the second direction R2 are perpendicular.

[0164] For example, the first direction R1 and the second direction R2 are perpendicular, and the third direction R3 is perpendicular to the first direction R1 and the second direction R2, respectively.

[0165] For example, the electrode assembly 502 includes a positive electrode 512, a negative electrode 522, and an insulating member 532. The insulating member 532 is disposed between the positive electrode 512 and the negative electrode 522.

[0166] For example, electrode assembly 502 has a flat region 542.

[0167] For example, the positive electrode 512, the negative electrode 522, and the separator 532 are wound together into a wound structure. The positive electrode 512 and the negative electrode 522 are arranged in a first direction R1 within the flat region 542. The electrode assembly 502 also has corner regions 552, with corner regions 552 provided on both opposite sides of the flat region 542, and the arrangement direction of the two corner regions 552 is arranged in a second direction R2.

[0168] For example, the positive electrode 512, the negative electrode 522, and the separator 532 are stacked into a laminated structure. The positive electrode 512 and the negative electrode 522 are arranged in a first direction R1 in the stacking direction within the flat region 542.

[0169] In this embodiment, the battery cell 500 has a certain height along the third direction R3. The two connecting pipes 31 are arranged at intervals along the third direction R3, which helps to make full use of the size space of the battery cell 500 in the third direction R3 to arrange the connecting pipes 31 and improve the space utilization rate.

[0170] It is understood that the arrangement of the connecting pipes 31 is not limited. For example, at least two connecting pipes 31 can be arranged at intervals along a third direction R3.

[0171] In some embodiments, please refer to Figure 4 and Figure 5 All the connectors between any two adjacent heat exchangers are located at one end of the battery cell assembly 1 along the second direction R2. The connector located at one end of the battery cell assembly 1 along the second direction R2 is the first connector 32, and the connector located at the other end of the battery cell assembly 1 along the second direction R2 is the second connector 33. Projected along the second direction R2, the projection areas of the first connector 32 and the projection areas of the second connector 33 are alternately arranged along the first direction R1.

[0172] For example, there are four first connectors 32 and four second connectors 33.

[0173] For example, the number of first connectors 32 is equal to the number of second connectors 33.

[0174] For example, the absolute value of the difference between the number of first connectors 32 and the number of second connectors 33 is equal to 1.

[0175] In this embodiment of the disclosure, since the projection areas of the first connector 32 and the second connector 33 are alternately arranged along the first direction R1, a corresponding accommodating space is formed between adjacent heat exchangers at the end of the battery cell assembly 1 away from the corresponding connector along the second direction R2, which can provide space for the arrangement of other structures.

[0176] It is understood that the arrangement of the connectors is not limited. Exemplarily, all connectors are first connectors 32, or all connectors are second connectors 33. Exemplarily, at least two connectors adjacent to each other along the first direction R1 are first connectors 32, and / or at least two connectors adjacent to each other along the first direction R1 are second connectors 33.

[0177] In some embodiments, please refer to Figure 3 The housing 400 includes a mounting groove 403 located on the outer side of the housing 400, and positioned between two adjacent heat exchangers along the first direction R1. The mounting groove 403 is recessed into the housing 400.

[0178] For example, please refer to Figure 4 and Figure 5 The battery cell assembly 1 between two adjacent heat exchangers and between the two adjacent heat exchangers forms a receiving cavity 5, which is used to accommodate the recessed structure of the housing 400 in the mounting slot 403. The connector between the heat exchangers and the adjacent heat exchangers is at least partially located in the protruding space between the two mounting slots 403 on the housing 400.

[0179] For example, the mounting slot 403 is at least partially located within the receiving cavity 5.

[0180] For example, the battery cell assembly 1 is located between the mounting groove 403 and the connector along the second direction R2.

[0181] For example, for the same pair of adjacent heat exchangers, the mounting slot 403 is located at the end of the battery cell assembly 1 away from the corresponding connector along the second direction R2.

[0182] Projecting along the second direction R2, the projection areas of the first connector 32 and the second connector 33 are alternately arranged along the first direction R1. Correspondingly, the projection areas of the mounting groove 403 located at one end of the battery cell assembly 1 along the second direction R2 and the projection areas of the mounting groove 403 located at the other end of the battery cell assembly 1 along the second direction R2 are alternately arranged along the first direction R1. The support member 700 can be evenly supported within the mounting groove 403.

[0183] For example, the mounting groove 403 is U-shaped.

[0184] For example, on at least one slot of mounting slot 403.

[0185] For example, the mounting groove 403 is open at one end along the third direction R3, and closed at the other end along the third direction R3. The groove wall at the other end of the mounting groove 403 along the third direction R3 is the bottom wall, which is located at the bottom of the mounting groove 403.

[0186] For example, the battery cell assembly 1 between two adjacent heat exchangers is located along the second direction R2 between the corresponding connector and the corresponding mounting groove 403.

[0187] For example, at least two of the battery cells 500 in each battery cell assembly 1 are arranged in a second direction R2, which is intersected with the first direction R1.

[0188] In this embodiment of the disclosure, the housing 400 is provided with a corresponding mounting groove 403, which can provide space for the arrangement of other structures.

[0189] It is understood that the structure of the housing 400 is not limited. For example, the housing 400 may not have the mounting slot 403 provided.

[0190] This disclosure provides a power supply 600, please refer to [link / reference]. Figure 1 and Figure 3 The battery device 100, including any embodiment of the present disclosure, is used to store or provide electrical energy. The number of battery devices 100 is at least two, and the at least two battery devices 100 are interconnected.

[0191] For example, two battery devices 100 can be connected in series to supply power to the electrical device.

[0192] For example, two battery devices 100 can be connected in parallel, and the two battery devices 100 connected in parallel can supply power to the electrical device together.

[0193] For example, two battery devices 100 can be connected in parallel, with one of the two battery devices 100 providing power and the other battery device 100 serving as a backup.

[0194] In this embodiment of the disclosure, the power supply 600 includes at least two battery devices 100, enabling the power supply 600 to flexibly utilize the battery devices 100 to supply power to the electrical device as needed.

[0195] In some embodiments, please refer to Figure 3The housing 400 includes a mounting groove 403 located on the outside of the housing 400. The mounting groove 403 is located between two adjacent heat exchangers along the first direction R1. The mounting groove 403 is recessed into the housing 400. At least two battery devices 100 are stacked sequentially along the extension direction of the mounting groove 403. The power supply 600 also includes a support member 700 located in the mounting groove 403. The support member 700 is connected to two adjacent battery devices 100 respectively.

[0196] For example, the support member 700 is connected to the housing 400 of two adjacent battery devices 100 respectively.

[0197] For example, the support member 700 has an I-shaped structure.

[0198] For example, one end of the support 700 is connected to the bottom wall of the mounting groove 403 of one of the battery devices 100, and the other end of the support 700 is connected to the bottom wall of the mounting groove 403 of the other battery device 100.

[0199] For example, at least two battery devices 100 are stacked vertically. The weight of the upper battery device 100 is mainly supported by the support member 700, which reduces the load of the upper battery device 100 on the lower battery device 100 and reduces the possibility of damage to the lower battery device 100.

[0200] In this embodiment of the present disclosure, the support member 700 is connected to two adjacent battery devices 100 respectively, so that the two battery devices 100 stacked sequentially along the extension direction of the mounting groove 403 can be installed more firmly.

[0201] In some embodiments, please refer to Figures 3-5 The battery device 100 further includes a connector for connecting the first chambers 21 of two adjacent heat exchangers in series and connecting the second chambers 22 of two adjacent heat exchangers in series. The connector is also used to isolate the first chambers 21 and second chambers 22 of two adjacent heat exchangers. At least two battery cells 500 in each battery cell assembly 1 are arranged in a second direction R2, which is intersected with the first direction R1. All connectors between two adjacent heat exchangers are located at one end of the battery cell assembly 1 along the second direction R2. The mounting groove 403 is located at the end of the corresponding battery cell assembly 1 along the second direction R2 away from the corresponding connector.

[0202] In this embodiment of the disclosure, the space between two adjacent heat exchangers at the end opposite to the connector is fully utilized to arrange the mounting groove 403 and the support member 700 located in the mounting groove 403, thereby improving space utilization.

[0203] In some embodiments, please refer to Figures 3-5 All the connectors between any two adjacent heat exchangers are located at one end of the battery cell assembly 1 along the second direction R2. The connector located at one end of the battery cell assembly 1 along the second direction R2 is the first connector 32, and the connector located at the other end of the battery cell assembly 1 along the second direction R2 is the second connector 33. Projected along the second direction R2, the projection areas of the first connector 32 and the projection areas of the second connector 33 are alternately arranged along the first direction R1.

[0204] For example, at least two of the battery cells 500 in each battery cell assembly 1 are arranged in a second direction R2, which is intersected with the first direction R1. The first chamber 21 of the second heat exchanger 24 receives heat exchange medium at one end along the second direction R2 and receives heat exchange medium at the other end. The second chamber 22 of the second heat exchanger 24 receives heat exchange medium at one end along the second direction R2 and receives heat exchange medium at the other end.

[0205] In this embodiment, the projection areas of the first connector 32 and the second connector 33 are alternately arranged along the first direction R1, projected along the second direction R2. Correspondingly, the projection areas of the mounting groove 403 located at one end of the battery cell assembly 1 along the second direction R2 and the projection areas of the mounting groove 403 located at the other end of the battery cell assembly 1 along the second direction R2 are alternately arranged along the first direction R1. The support member 700 can provide uniform support within the mounting groove 403. Furthermore, the first connector 32, the corresponding mounting groove 403, and the support member 700 within the mounting groove 403 are arranged along the first direction R1, while the second connector 33, the corresponding mounting groove 403, and the support member 700 within the mounting groove 403 are arranged along the second direction R2. This allows for more efficient use of the space on both sides of the battery cell assembly 1 along the second direction R2, improving space utilization.

[0206] For the battery device 100 of this disclosure embodiment, please refer to [link to relevant documentation]. Figures 1-10The battery device 100 includes a housing 400, at least two battery cell assemblies 1, and a heat exchanger. The battery cell assemblies 1 are located within the housing 400. The arrangement direction of the at least two battery cell assemblies 1 is a first direction R1, and each battery cell assembly 1 includes at least two battery cells 500. The heat exchanger is used to exchange heat with the battery cell assemblies 1. The heat exchanger has a first cavity 21 and a second cavity 22. At least one heat exchanger is a first heat exchanger 23, whose first cavity 21 and second cavity 22 are interconnected. At least one heat exchanger is a second heat exchanger 24, which is arranged along the first direction R1 with the first heat exchanger 23. The first cavity 21 and second cavity 22 of the second heat exchanger 24 are isolated from each other. The first cavity 21 of the second heat exchanger 24, the first cavity 21 of the first heat exchanger 23, the second cavity 22 of the first heat exchanger 23, and the second cavity 22 of the second heat exchanger 24 are connected in series. At least two battery cells 500 in each battery cell assembly 1 are arranged in a second direction R2, which intersects with the first direction R1. The first cavity 21 of the second heat exchanger 24 receives heat exchange medium at one end along the second direction R2 and exits at the other end. The second cavity 22 of the second heat exchanger 24 receives heat exchange medium at one end along the second direction R2 and exits at the other end. The battery device 100 also includes a connector for connecting the first cavities 21 of two adjacent heat exchangers in series and connecting the second cavities 22 of two adjacent heat exchangers in series. The connector also isolates the first cavities 21 and second cavities 22 of two adjacent heat exchangers. At least two battery cells 500 in each battery cell assembly 1 are arranged in a second direction R2, which intersects with the first direction R1. All connectors between two adjacent heat exchangers are located at one end of the battery cell assembly 1 along the second direction R2. The mounting groove 403 is located at the end of the corresponding battery cell assembly 1 along the second direction R2 away from the corresponding connector. All connectors between any two adjacent heat exchangers are located at one end of the battery cell assembly 1 along the second direction R2. The connector located at one end of the battery cell assembly 1 along the second direction R2 is the first connector 32, and the connector located at the other end of the battery cell assembly 1 along the second direction R2 is the second connector 33. Projected along the second direction R2, the projection areas of the first connector 32 and the second connector 33 are alternately arranged along the first direction R1. The support member 700 can provide uniform support within the mounting groove 403.Furthermore, the first connector 32, its corresponding mounting slot 403, and the support member 700 within the mounting slot 403 are arranged along the first direction R1, while the second connector 33, its corresponding mounting slot 403, and the support member 700 within the mounting slot 403 are arranged along the second direction R2. This allows for more efficient use of the space on both sides of the battery cell assembly 1 along the second direction R2, improving space utilization, increasing energy density, and reducing the material cost of the housing 400. Two battery devices 100 are stacked vertically, with eight support members 700, four at each end of the battery cell assembly 1 along the second direction R2. The support members 700 are located in the middle of adjacent heat exchangers. The heat exchangers are liquid-cooled plates. The heat exchangers are arranged between the large surfaces of the battery cells 500 in adjacent battery cell assemblies 1, where the large surface refers to the surface with the largest area of ​​the battery cell 500. The connector includes at least two connecting pipes 31, which are corrugated pipes. The support members 700 are bolted or welded to the housings 400 of the two battery devices 100.

[0207] The above embodiments are merely illustrative of the technical solutions of this disclosure and are not intended to limit it. Although this disclosure 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; and 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 disclosure. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way.

Claims

1. A battery device, characterized in that, include: Box; At least two battery cell assemblies are located inside the housing, and the arrangement direction of the at least two battery cell assemblies is a first direction. Each battery cell assembly includes at least two battery cells. A heat exchanger is used to exchange heat between the battery cell assembly. The heat exchanger has a first cavity and a second cavity. At least one of the heat exchangers is a first heat exchanger, and the first cavity and the second cavity of the first heat exchanger are interconnected. At least one of the heat exchangers is a second heat exchanger, and the second heat exchanger and the first heat exchanger are arranged along the first direction. The first cavity and the second cavity of the second heat exchanger are isolated from each other. The first cavity of the second heat exchanger, the first cavity of the first heat exchanger, the second cavity of the first heat exchanger, and the second cavity of the second heat exchanger are connected in series.

2. The battery device according to claim 1, characterized in that, The number of the second heat exchangers is at least two, the at least two second heat exchangers are arranged along the first direction, the first cavities of the at least two second heat exchangers are connected in series, and the second cavities of the at least two second heat exchangers are connected in series.

3. The battery device according to claim 1 or 2, characterized in that, At least two of the battery cells in each battery cell assembly are arranged in a second direction, which intersects with the first direction. The first cavity and the second cavity both extend along the second direction. The first cavity and the second cavity are arranged in a third direction, which intersects with the first direction and the second direction, respectively.

4. The battery device according to claim 1 or 2, characterized in that, The battery device further includes connectors for connecting the first cavities of two adjacent heat exchangers in series and connecting the second cavities of two adjacent heat exchangers in series, and for isolating the first and second cavities of two adjacent heat exchangers. At least two of the battery cells in each battery cell assembly are arranged in a second direction, which is intersected with the first direction. All the connectors between two adjacent heat exchangers are located at one end of the battery cell assembly along the second direction.

5. The battery device according to claim 4, characterized in that, The connector includes at least two connecting pipes, the two ends of which are respectively connected to two adjacent heat exchangers. The first chambers of the two adjacent heat exchangers are connected through the corresponding connecting pipes, and the second chambers of the two adjacent heat exchangers are connected through the corresponding connecting pipes.

6. The battery device according to claim 5, characterized in that, All two connecting pipes between two adjacent heat exchangers are arranged at intervals along a third direction, which intersects the first direction and the second direction respectively.

7. The battery device according to claim 4, characterized in that, All the connectors between any two adjacent heat exchangers are located at one end of the battery cell assembly along the second direction. The connector located at one end of the battery cell assembly along the second direction is the first connector, and the connector located at the other end of the battery cell assembly along the second direction is the second connector. Projected along the second direction, the projection areas of the first connector and the projection areas of the second connector are arranged alternately along the first direction.

8. The battery device according to claim 1 or 2, characterized in that, The housing includes a mounting groove located on the outside of the housing. The mounting groove is located between two adjacent heat exchangers along the first direction and is recessed into the housing.

9. A power supply, characterized in that, Includes a battery device according to any one of claims 1 to 8, the battery device being used to store or provide electrical energy, the number of battery devices being at least two, and the at least two battery devices being interconnected.

10. A power supply, characterized in that, The device includes a battery device according to any one of claims 1 to 3, the battery device being used to store or provide electrical energy, the number of battery devices being at least two, the at least two battery devices being interconnected, the housing including a mounting groove located on the outside of the housing, the mounting groove being located between two adjacent heat exchangers along the first direction, the mounting groove being recessed into the housing, the at least two battery devices being stacked sequentially along the extending direction of the mounting groove, the power supply including a support member located within the mounting groove, the support member being connected to two adjacent battery devices respectively.

11. The power supply according to claim 10, characterized in that, The battery device further includes connectors for connecting the first cavities of two adjacent heat exchangers in series and connecting the second cavities of two adjacent heat exchangers in series, and for isolating the first and second cavities of two adjacent heat exchangers. At least two battery cells in each battery cell assembly are arranged in a second direction, which is intersected with the first direction. All connectors between two adjacent heat exchangers are located at one end of the battery cell assembly along the second direction, and mounting slots are located at one end of the corresponding battery cell assembly away from the corresponding connector along the second direction.

12. The power supply according to claim 11, characterized in that, All the connectors between any two adjacent heat exchangers are located at one end of the battery cell assembly along the second direction. The connector located at one end of the battery cell assembly along the second direction is the first connector, and the connector located at the other end of the battery cell assembly along the second direction is the second connector. Projected along the second direction, the projection areas of the first connector and the projection areas of the second connector are arranged alternately along the first direction.

13. An electrical appliance, characterized in that, Includes a battery device according to any one of claims 1 to 8 or a power source according to any one of claims 9 to 12, wherein the battery device and the power source are used to store or provide electrical energy.

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