Battery and electric apparatus

Abstract

Disclosed in the present application are a battery and an electric apparatus. The battery comprises a first layer of battery cells, a second layer of battery cells and a thermal management assembly, wherein the first layer of battery cells and the second layer of battery cells are stacked in a first direction; at least a portion of the thermal management assembly is located between the first layer of battery cells and the second layer of battery cells; and the first layer of battery cells and the second layer of battery cells are both in thermally conductive connection with the thermal management assembly, and the thermal management assembly is used for regulating the temperatures of the first layer of battery cells and the second layer of battery cells. The energy density of the battery can be effectively improved.

Description

Battery and electric device Cross-reference to related applications

[0001] The present application claims priority to Chinese Patent Application No. 202421119288.X, filed on May 21, 2024, entitled “Battery and electric device”, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the technical field of batteries, in particular to a battery and an electric device. BACKGROUND

[0003] With the development of new energy technology, batteries are increasingly widely used. Batteries have high energy density, high reliability, long service life, and green environmental protection to the society, and have been widely used in passenger cars, commercial vehicles, electric bicycles, heavy trucks, energy storage facilities, battery replacement stations, engineering manufacturing, intelligent instruments, etc., and also promote the development and research of communication terminals, medical instruments, energy development, etc.

[0004] In the battery technology, how to improve the energy density of the battery is a technical problem to be solved. SUMMARY

[0005] The embodiments of the present application provide a battery and an electric device, which can effectively improve the energy density of the battery.

[0006] In a first aspect, the embodiments of the present application provide a battery, which includes a first layer of battery monomers, a second layer of battery monomers, and a thermal management assembly. The first layer of battery monomers and the second layer of battery monomers are arranged in a stack along a first direction. At least a portion of the thermal management assembly is located between the first layer of battery monomers and the second layer of battery monomers.

[0007] The first layer of battery monomers and the second layer of battery monomers are both in thermal conductive connection with the thermal management assembly. The thermal management assembly is used to adjust the temperature of the first layer of battery monomers and the second layer of battery monomers.

[0008] In the above technical solution, the first layer of battery monomers and the second layer of battery monomers share the thermal management assembly, which simplifies the number of settings of the thermal management assembly, and the integration of the battery is high, which is conducive to improving the energy density of the battery.

[0009] In some embodiments, the first layer of battery monomers is connected to the thermal management assembly through a first thermal conductive glue, and the second layer of battery monomers is connected to the thermal management assembly through a second thermal conductive glue.

[0010] In the technical solution, the first thermal conductive glue can improve the heat exchange efficiency of the first layer of battery monomers and the thermal management component, and the second thermal conductive glue can improve the heat exchange efficiency of the second layer of battery monomers and the thermal management component, thereby improving the thermal management effect and improving the reliability of the battery.

[0011] In some embodiments, the thermal management component includes a first thermal management part and a pair of second thermal management parts; along the first direction, the first thermal management part is located between the first layer of battery monomers and the second layer of battery monomers; the pair of second thermal management parts are arranged in a second direction, and the first thermal management part is connected to the pair of second thermal management parts, and the second direction is perpendicular to the first direction.

[0012] In the technical solution, a thermal management component with higher structural strength and larger heat exchange area can be obtained.

[0013] In some embodiments, the first thermal management part and the second thermal management part are integrally formed or welded.

[0014] In the technical solution, integrally forming the first thermal management part and the second thermal management part can obtain a thermal management component with higher structural strength, and welding the first thermal management part and the second thermal management part can reduce the difficulty of preparing the thermal management component.

[0015] In some embodiments, along the first direction, the first thermal management part has oppositely arranged first and second surfaces, and the two ends of the second thermal management part respectively extend beyond the first and second surfaces.

[0016] Along the second direction, the first layer of battery monomers and the second layer of battery monomers are located between the pair of second thermal management parts.

[0017] In the technical solution, the first layer of battery monomers is located between the pair of second thermal management parts, which can improve the thermal management effect of the thermal management component on the first layer of battery monomers. The second layer of battery monomers is located between the pair of second thermal management parts, which can improve the thermal management effect of the thermal management component on the second layer of battery monomers, thereby balancing the internal temperature of the battery and improving the reliability of the battery.

[0018] In some embodiments, the first thermal conductive glue includes a first part and a second part, the first layer of battery monomers is connected to the first thermal management part through the first part, and the first layer of battery monomers is connected to the second thermal management part through the second part.

[0019] In the technical solution, the first part is located between the first layer of battery monomers and the first thermal management component to improve the heat exchange efficiency between the first thermal management component and the first layer of battery monomers. The second part is located between the first layer of battery monomers and the second thermal management component to improve the heat exchange efficiency between the second thermal management component and the first layer of battery monomers.

[0020] In some embodiments, the second thermal conductive adhesive comprises a third part and a fourth part, the second layer of battery monomers is connected with the first thermal management component through the third part, and the second layer of battery monomers is connected with the second thermal management component through the fourth part.

[0021] In the technical solution, the third part is located between the second layer of battery monomers and the first thermal management component to improve the heat exchange efficiency between the first thermal management component and the second layer of battery monomers. The fourth part is located between the second layer of battery monomers and the second thermal management component to improve the heat exchange efficiency between the second thermal management component and the second layer of battery monomers.

[0022] In some embodiments, the battery further comprises a first cover and a second cover. The first cover is connected to the second thermal management component, and along the first direction, the first layer of battery monomers is located between the first cover and the first thermal management component. The second cover is connected to the second thermal management component, and along the first direction, the first cover and the second cover are oppositely arranged, the first thermal management component is located between the first cover and the second cover, and the second layer of battery monomers is located between the second cover and the first thermal management component.

[0023] In the technical solution, the first layer of battery monomers is located between the first cover and the first thermal management component, which reduces the risk of damage to the first layer of battery monomers and improves the maintainability of the first layer of battery monomers. The second layer of battery monomers is located between the second cover and the first thermal management component, which reduces the risk of damage to the second layer of battery monomers and improves the maintainability of the second layer of battery monomers.

[0024] In some embodiments, the first layer of battery monomers comprises a plurality of first battery modules arranged at intervals along a second direction, and the second direction is perpendicular to the first direction. The thermal management assembly comprises a first thermal management component and a third thermal management component.

[0025] Along the first direction, the first thermal management component is located between the first layer of battery monomers and the second layer of battery monomers, and the third thermal management component is arranged between the first thermal management component and adjacent two first battery modules.

[0026] In the technical solution, the third thermal management component can improve the heat exchange area between the thermal management assembly and the first battery module, and improve the heat exchange efficiency.

[0027] In some embodiments, the first thermal conductive glue includes a first portion and a fifth portion, the first battery module is connected with the first thermal management component through the first portion, and the first battery module is connected with the third thermal management component through the fifth portion.

[0028] In the technical solution, the first portion is located between the first battery module and the first thermal management component, so as to improve the heat exchange efficiency between the first thermal management component and the first battery module. The fifth portion is located between the first battery module and the third thermal management component, so as to improve the heat exchange efficiency between the third thermal management component and the first battery module.

[0029] In some embodiments, the first thermal management component and the third thermal management component are integrally formed or welded.

[0030] In the technical solution, the first thermal management component and the third thermal management component are integrally formed, so that a thermal management assembly with high structural strength can be obtained. The first thermal management component and the third thermal management component can reduce the preparation difficulty of the thermal management assembly.

[0031] In some embodiments, the second layer of battery monomers includes a plurality of second battery modules arranged at intervals along the second direction.

[0032] The thermal management assembly further includes a fourth thermal management component, which is arranged on the first thermal management component and located between two adjacent second battery modules.

[0033] In the technical solution, the fourth thermal management component can increase the heat exchange area between the thermal management assembly and the second battery module, and improve the heat exchange efficiency.

[0034] In some embodiments, the second thermal conductive glue includes a third portion and a sixth portion, the second battery module is connected with the first thermal management component through the third portion, and the second battery module is connected with the fourth thermal management component through the sixth portion.

[0035] In the technical solution, the third portion is located between the second battery module and the first thermal management component, so as to improve the heat exchange efficiency between the first thermal management component and the second battery module. The sixth portion is located between the second battery module and the fourth thermal management component, so as to improve the heat exchange efficiency between the fourth thermal management component and the second battery module.

[0036] In some embodiments, the first thermal management component and the fourth thermal management component are integrally formed or welded.

[0037] In the technical solution, the first thermal management component and the fourth thermal management component are integrally formed, so that the thermal management assembly has high structural strength. The first thermal management component and the fourth thermal management component are welded, so that the preparation difficulty of the thermal management assembly is reduced.

[0038] In some embodiments, the first layer of battery cells includes a plurality of first battery cells, and an end of the first battery cells away from the second layer of battery cells is provided with a first electrode terminal along the first direction;

[0039] The second layer of battery cells includes a plurality of second battery cells, and an end of the second battery cells away from the first layer of battery cells is provided with a second electrode terminal along the first direction.

[0040] In the technical solution, the first electrode terminal is arranged at an end of the first battery cell away from the second layer of battery cells, and the second electrode terminal is arranged at an end of the second battery cell away from the first layer of battery cells, so that the first electrode terminal and the second electrode terminal are far away from each other, the risk of short circuit between the first layer of battery cells and the second layer of battery cells is reduced, and the electrical reliability is improved.

[0041] In some embodiments, the first direction is parallel to the direction of gravity.

[0042] In a second aspect, the embodiments of the present application provide a power consumption device, which includes the battery described above, and the battery is used to supply power for the power consumption device. BRIEF DESCRIPTION OF DRAWINGS

[0043] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0044] FIG. 1 is a structural schematic diagram of a vehicle according to some embodiments of the present application;

[0045] FIG. 2 is an exploded schematic diagram of a battery according to some embodiments of the present application;

[0046] FIG. 3 is a cross-sectional view of a battery according to some embodiments of the present application;

[0047] FIG. 4 is a cross-sectional view of a battery according to some other embodiments of the present application;

[0048] FIG. 5 is a structural schematic diagram of a thermal management assembly according to some embodiments of the present application;

[0049] FIG. 6 is a structural schematic diagram of a thermal management assembly according to some other embodiments of the present application;

[0050] FIG. 7 is a structural schematic diagram of a thermal management assembly and an end wall according to some embodiments of the present application;

[0051] FIG. 8 is an exploded schematic diagram of a first cover according to some embodiments of the present application.

[0052] Legend: 100 - battery; 10 - first layer of battery cells; 11 - first battery module; 101 - first battery cell; 1011 - first electrode terminal; 20 - second layer of battery cells; 21 - second battery module; 201 - second battery cell; 2011 - second electrode terminal; 30 - first cover; 31 - first cover body; 32 - first inner layer plate; 33 - first buffer layer; 40 - second cover; 50 - thermal management assembly; 51 - second thermal management component; 511 - second flow channel; 52 - first thermal management component; 521 - first surface; 522 - second surface; 523 - first flow channel; 53 - third thermal management component; 531 - third flow channel; 54 - fourth thermal management component; 541 - fourth flow channel; 60 - first thermal conductive glue; 61 - first part; 62 - second part; 63 - fifth part; 70 - second thermal conductive glue; 71 - third part; 72 - fourth part; 73 - sixth part; 80 - end wall; 81 - first outer flange; 82 - second outer flange; 91 - first cavity; 92 - second cavity; 1000 - vehicle; 200 - motor; 300 - controller; Z - first direction; Y - second direction; X - third direction.

[0053] The accompanying drawings are not drawn to scale. DETAILED DESCRIPTION

[0054] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0055] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the specification of the present application is only for the purpose of describing specific embodiments and is not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification of the present application and claims and the above description of drawings are intended to cover non-exclusive inclusion. The terms "first", "second" and the like in the specification of the present application and claims or the above description of drawings are used to distinguish different objects, not to describe a particular order or primary and secondary relationship.

[0056] Reference within this application to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another.

[0057] In the description of the application, it is necessary to explain that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "attaching" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0058] In the description of the application, it is necessary to explain that, unless otherwise specified, the meaning of "multiple" is more than two; the orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer" and the like is only for the convenience of describing the application and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application. In addition, the terms "first", "second", "third" and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance. "Vertical" is not strictly vertical, but within the allowable range of error. "Parallel" is not strictly parallel, but within the allowable range of error.

[0059] The term "and / or" in this application is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can mean that A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in this application generally represents that the front and rear associated objects have an "or" relationship.

[0060] In the embodiments of the application, the same reference signs represent the same components, and for the sake of brevity, detailed description of the same components is omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the application shown in the drawings, as well as the overall thickness, length, width and other dimensions of integrated devices, are only exemplary and should not constitute any limitation on the application.

[0061] "Multiple" appearing in this application means more than two (including two).

[0062] In the present application, the battery cell can include, but is not limited to, a lithium-ion secondary battery, a lithium-ion primary battery, a lithium-sulfur battery, a sodium lithium-ion battery, a sodium-ion battery, or a magnesium-ion battery, etc. The battery cell includes, but is not limited to, a cylinder, a flat body, a cuboid, or other shapes, etc. The battery cell generally includes, in the form of packaging, a cylindrical battery cell, a square battery cell, and a soft-pack battery cell, etc. The battery cell can also be a blade battery.

[0063] Exemplarily, the battery cell includes an electrode assembly and an electrolyte, and the electrode assembly is composed of a positive electrode sheet, a negative electrode sheet, and a separator film. The battery cell mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work, and the metal ions (such as lithium ions) are embedded and extracted between the positive electrode and the negative electrode. The separator film is arranged between the positive electrode and the negative electrode, which can prevent the positive electrode sheet and the negative electrode sheet from short-circuiting, and at the same time can make the active ions pass through.

[0064] The positive electrode sheet includes a positive electrode current collector and a positive electrode active material layer, the positive electrode active material layer is coated on the surface of the positive electrode current collector, and the positive electrode current collector without the positive electrode active material layer protrudes from the positive electrode current collector with the positive electrode active material layer, and the positive electrode current collector without the positive electrode active material layer serves as a positive electrode tab.

[0065] Taking a lithium-ion battery as an example, the positive electrode active material can be lithium cobaltate, lithium iron phosphate, ternary lithium, or lithium manganate, etc. The positive electrode current collector can adopt a metal foil or a composite current collector. For example, as a metal foil, aluminum with silver surface plating treatment, stainless steel with silver surface plating treatment, stainless steel, copper, aluminum, a carbon electrode, carbon, nickel, or titanium, etc. can be used. The composite current collector can include a high 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 high polymer material base material (such as a base material of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0066] The negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer, the negative electrode active material layer is coated on the surface of the negative electrode current collector, and the negative electrode current collector without the negative electrode active material layer protrudes from the negative electrode current collector with the negative electrode active material layer, and the negative electrode current collector without the negative electrode active material layer serves as a negative electrode tab.

[0067] The negative electrode current collector can adopt a metal foil or a composite current collector. For example, as a metal foil, aluminum with silver surface plating treatment, stainless steel with silver surface plating treatment, stainless steel, copper, aluminum, a carbon electrode, carbon, nickel, or titanium, etc. can be used. The negative electrode active material can be carbon or silicon, etc.

[0068] In order to reduce the risk of fusing by a large current, the number of positive electrode tabs is multiple and stacked together, and the number of negative electrode tabs is multiple and stacked together. The material of the isolation film can be PP (polypropylene), PE (polyethylene), or the like. In addition, the electrode assembly can be a roll type structure or a stacked type structure.

[0069] The battery referred to in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity. The battery generally includes a box for packaging one or more battery cells. The box can reduce the influence of liquid or other foreign matters on the charging or discharging of the battery cells.

[0070] In some embodiments, the battery can be an energy storage device. The energy storage device includes an energy storage container, an energy storage cabinet, etc.

[0071] The development of battery technology needs to consider various design factors, such as performance parameters such as energy density, cycle life, discharge capacity, and charge-discharge rate, and the power density of the battery.

[0072] In battery technology, the temperature of the battery cell is usually adjusted by bottom water cooling. The more the number of battery cells, the larger the area of the required thermal management component, and the more space occupied, resulting in a decrease in battery energy density.

[0073] In view of this, in order to solve the problem of large space occupied by the thermal management component and low energy density of the battery, the embodiments of the present application provide a battery, which includes a first layer of battery cells, a second layer of battery cells, and a thermal management component. The first layer of battery cells and the second layer of battery cells are arranged in a stacked manner along the direction of gravity, and at least a part of the thermal management component is located between the first layer of battery cells and the second layer of battery cells. By thermally connecting the first layer of battery cells and the second layer of battery cells to the thermal management component, the first layer of battery cells and the second layer of battery cells share one thermal management component, which simplifies the number of thermal management components, improves the integration of the battery, and improves the energy density of the battery.

[0074] The technical solutions disclosed in the embodiments of the present application are applicable to but not limited to a battery 100 and a power consumption device using the battery 100.

[0075] The electric device can be a vehicle 1000, a mobile phone, a portable device, a notebook computer, a ship, a spacecraft, an electric toy, and an electric tool, etc. The vehicle 1000 can be a fuel automobile, a gas automobile, or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid electric automobile, or a range extended automobile, etc. The spacecraft includes an airplane, a rocket, a space shuttle, and a spacecraft, etc. The electric toy includes a fixed or mobile electric toy, for example, a game machine, an electric automobile toy, an electric ship toy, and an electric airplane toy, etc. The electric tool includes a metal cutting electric tool, a grinding electric tool, an assembling electric tool, and a railway electric tool, for example, an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact electric drill, a concrete vibrator, and an electric planer, etc.

[0076] The following embodiments are described by taking the electric device as the vehicle 1000 for convenience of description.

[0077] Please refer to FIG. 1, which is a structural schematic diagram of the vehicle 1000 according to some embodiments of the present application. The vehicle 1000 is internally provided with a battery 100, which can be arranged at the bottom, the head, or the tail of the vehicle 1000. The battery 100 can be used for power supply of the vehicle 1000, for example, the battery 100 can be used as an operating power supply of the vehicle 1000.

[0078] The vehicle 1000 can further include a controller 300 and a motor 200, and the controller 300 is used to control the battery 100 to supply power to the motor 200, for example, to meet the working power demand of the vehicle 1000 during starting, navigation, and driving.

[0079] In some embodiments of the present application, the battery 100 can not only be used as an operating power supply of the vehicle 1000, but also be used as a driving power supply of the vehicle 1000, to replace or partially replace fuel or natural gas to provide driving power for the vehicle 1000.

[0080] FIG. 2 is an exploded schematic diagram of the battery 100 according to some embodiments of the present application; and FIG. 3 is a sectional view of the battery 100 according to some embodiments of the present application.

[0081] Referring to FIGS. 2 and 3, the present embodiment provides a battery 100, which includes a first layer of battery monomers 10, a second layer of battery monomers 20, and a thermal management assembly 50. The first layer of battery monomers 10 and the second layer of battery monomers 20 are arranged in a stacked manner along a first direction Z. At least a part of the thermal management assembly 50 is located between the first layer of battery monomers 10 and the second layer of battery monomers 20. The first layer of battery monomers 10 and the second layer of battery monomers 20 are both in thermal conductive connection with the thermal management assembly 50, and the thermal management assembly 50 is used to adjust the temperature of the first layer of battery monomers 10 and the second layer of battery monomers 20.

[0082] The first layer of battery cells 10 can include a plurality of first battery cells 101, which can be connected in series, in parallel, or in a mixed connection. The mixed connection means that there are both series and parallel connections among the plurality of first battery cells 101. The plurality of first battery cells 101 can be arranged and fixed to form one or more battery 100 modules. For example, the plurality of first battery cells 101 are arranged and fixed to form four battery 100 modules.

[0083] The second layer of battery cells 20 can include a plurality of second battery cells 201, which can be connected in series, in parallel, or in a mixed connection. The mixed connection means that there are both series and parallel connections among the plurality of second battery cells 201. The plurality of second battery cells 201 can be arranged and fixed to form one or more battery 100 modules. For example, the plurality of second battery cells 201 are arranged and fixed to form four battery 100 modules.

[0084] In some embodiments, the battery 100 can further include a busbar component (not shown in the figure), through which the plurality of first battery cells 101 can be connected in series, in parallel, or in a mixed connection. The plurality of second battery cells 201 can also be connected in series, in parallel, or in a mixed connection through the busbar component. The busbar component can be a metal conductor, such as copper, iron, aluminum, steel, aluminum alloy, etc.

[0085] The thermal management component 50 is a component for adjusting the temperature of the battery 100 cells, and a flow channel for accommodating a heat exchange medium is formed inside the thermal management component 50. The heat exchange medium can also be referred to as a cooling medium or a cooling fluid, and can be a liquid or a gas. Adjusting the temperature means heating or cooling the plurality of battery 100 cells. Optionally, the fluid can be circulated to achieve better temperature adjustment. Optionally, the fluid can be water, a mixture of water and ethylene glycol, or air, etc.

[0086] In some embodiments, the battery 100 can include a box body, which includes two hollow cover body structures, and the two cover bodies are combined to form an accommodation space for accommodating the first layer of battery cells 10 and the second layer of battery cells 20.

[0087] At least a part of the thermal management component 50 is located between the first layer of battery cells 10 and the second layer of battery cells 20. It can be understood that the thermal management component 50 can be partially located between the first layer of battery cells 10 and the second layer of battery cells 100; the thermal management component 50 can also be entirely located between the first layer of battery cells 10 and the second layer of battery cells 20, for example, the thermal management component 50 is a rectangular plate, and the first layer of battery cells 10 and the second layer of battery cells 20 are arranged on the two sides of the thickness direction of the rectangular plate.

[0088] The first direction Z can be the direction of gravity or a direction having an angle with the direction of gravity. In the following, for the convenience of description, the rectangular battery 100 is taken as an example, the direction parallel to the direction of gravity is defined as the first direction Z, the width direction of the battery 100 is defined as the second direction Y, and the length direction of the battery 100 is defined as the third direction X.

[0089] In some embodiments, the first direction Z is regarded as the direction of gravity, and the first layer of battery monomers 10 and the second layer of battery monomers 20 are located on the upper and lower sides of the thermal management assembly 50. For example, as shown in FIG. 3, the first layer of battery monomers 10 is arranged on the upper side, the second layer of battery monomers 100 is arranged on the upper side, and a part of the thermal management assembly 50 is located between the first layer of battery monomers 10 and the second layer of battery monomers 20.

[0090] The thermal management assembly 50 is used to adjust the temperature of the first layer of battery monomers 10 and the second layer of battery monomers 20, that is, the thermal management assembly 50 adjusts the temperature of both the first layer of battery monomers 10 and the second layer of battery monomers 20, and the first layer of battery monomers 10 and the second layer of battery monomers 20 share the thermal management assembly 50.

[0091] The first layer of battery monomers 10 and the second layer of battery monomers 20 are both in thermal conductive connection with the thermal management assembly 50, which means that the first layer of battery monomers 10 and the second layer of battery monomers 20 can exchange heat. The thermal conductive connection can be direct contact or by arranging a thermal conductive medium. The thermal conductive medium includes but is not limited to thermal conductive glue, thermal conductive paste, thermal conductive film, etc. Alternatively, the first layer of battery monomers 10 and the second layer of battery monomers 20 are both connected with the thermal management assembly 50 by thermal conductive glue.

[0092] The material of the thermal management assembly 50 can be various, such as copper, iron, aluminum, aluminum alloy, etc. Alternatively, the material of the thermal management assembly 50 is aluminum alloy, and copper, manganese and silicon, etc. can be added to the composition of the aluminum alloy to improve the structural performance of the thermal management assembly 50. For example, the addition of copper can improve the strength of the alloy; the addition of manganese can improve the corrosion resistance and strength of the aluminum alloy; and the addition of silicon can improve the corrosion resistance and reduce the thermal expansion coefficient.

[0093] In the above embodiments, the first layer of battery monomers 10 and the second layer of battery monomers 20 share the thermal management assembly 50, which simplifies the number of settings of the thermal management assembly 50, increases the integration of the battery 100, and is conducive to improving the energy density of the battery 100.

[0094] FIG. 4 is a cross-sectional view of the battery 100 according to some embodiments of the present application.

[0095] Referring to FIG. 4, in some embodiments, the first layer of battery monomers 10 is connected to the thermal management assembly 50 by the first thermal conductive glue 60, and the second layer of battery monomers 20 is connected to the thermal management assembly 50 by the second thermal conductive glue 70.

[0096] The heat-conducting adhesive is an adhesive with connection and heat-conducting functions. The heat-conducting adhesive can be made of silicone glue, epoxy resin or acrylic acid as the main material, and filled with high polymer materials such as fillers and heat-conducting materials.

[0097] The material of the first heat-conducting adhesive 60 and the second heat-conducting adhesive 70 can be the same or different.

[0098] The first heat-conducting adhesive 60 and the second heat-conducting adhesive 70 can be selected according to design needs. The first heat-conducting adhesive 60 and the second heat-conducting adhesive 70 can include but are not limited to silicone heat-conducting adhesive, epoxy resin AB adhesive, acrylic heat-conducting adhesive, polyurethane heat-conducting adhesive, etc.

[0099] In this embodiment, the first heat-conducting adhesive 60 can improve the heat exchange efficiency of the first layer of battery monomers 10 and the thermal management assembly 50, and the second heat-conducting adhesive 70 can improve the heat exchange efficiency of the second layer of battery monomers 20 and the thermal management assembly 50, thereby improving the thermal management effect and improving the reliability of the battery 100.

[0100] FIG. 5 is a structural schematic diagram of the thermal management assembly 50 according to some embodiments of the present application.

[0101] Referring to FIG. 5, and in combination with FIG. 2, in some embodiments, the thermal management assembly 50 includes a first thermal management component 52 and a pair of second thermal management components 51. Along the first direction Z, the first thermal management component 52 is located between the first layer of battery monomers 10 and the second layer of battery monomers 20. The pair of second thermal management components 51 are spaced apart along the second direction Y, and the first thermal management component 52 connects the pair of second thermal management components 51. The second direction Y is perpendicular to the first direction Z.

[0102] The first thermal management component 52 and the second thermal management component 51 are both heat exchange components, and flow channels for accommodating heat exchange medium are formed inside the first thermal management component 52 and the second thermal management component 51. As shown in FIG. 3, a first flow channel 523 is formed inside the first thermal management component 52, and a second flow channel 511 is formed inside the second thermal management component 51. The first flow channel 523 and the second flow channel 511 can be communicated, or the first flow channel 523 and the second flow channel 511 can be independent of each other.

[0103] The structure and material of the first thermal management component 52 and the second thermal management component 51 can be the same or different. Alternatively, in some embodiments, the first thermal management component 52 and the second thermal management component 51 are both configured as rectangular plates. The thickness direction of the first thermal management component 52 is parallel to the first direction Z, and the thickness direction of the second thermal management component 51 is perpendicular to the first direction Z.

[0104] The first thermal management component 52 has opposite first and second surfaces 521 and 522 along its thickness direction. In some embodiments, as shown in FIG. 5, along the first direction Z, the two ends of the second thermal management component 51 respectively extend beyond the first and second surfaces 521 and 522, and the first thermal management component and the pair of second thermal management components 51 are connected to form an H shape.

[0105] In the present embodiment, the thermal management assembly 50 includes the first thermal management component 52 and the pair of second thermal management components 51 to obtain a thermal management assembly 50 with higher structural strength and larger heat exchange area.

[0106] In some embodiments, the first thermal management component 52 is integrally formed with the second thermal management component 51. The integral forming process includes but is not limited to injection molding, extrusion molding, etc.

[0107] The integral forming of the first thermal management component 52 with the second thermal management component 51 can obtain a thermal management assembly 50 with higher structural strength.

[0108] In some embodiments, the first thermal management component 52 is welded with the second thermal management component 51. The welding method includes but is not limited to laser welding, friction stir welding, brazing, etc. Optionally, the first thermal management component 52 is welded with the second thermal management component 51 by friction stir welding.

[0109] The welding of the first thermal management component 52 with the second thermal management component 51 can reduce the difficulty of preparing the thermal management assembly 50.

[0110] Referring to FIG. 5, in some embodiments, along the first direction Z, the first thermal management component 52 has opposite first and second surfaces 521 and 522, and the two ends of the second thermal management component 51 respectively extend beyond the first and second surfaces 521 and 522. Along the second direction Y, the first and second layers of battery cells 10 and 20 are located between the pair of second thermal management components 51.

[0111] The two ends of the second thermal management component 51 respectively extend beyond the first and second surfaces 521 and 522, i.e., the two ends of the second thermal management component 51 respectively protrude from the first and second surfaces 521 and 522. In some embodiments, the first thermal management component 52 and the pair of second thermal management components 51 are connected to form an H shape, along the second direction Y, the two second thermal management components 51 are respectively located on the two sides of the first layer of battery cells 10, the first layer of battery cells 10 is located between the pair of second thermal management components 51, and the two second thermal management components 51 are also respectively located on the two sides of the second layer of battery cells 20, and the second layer of battery cells 20 is also between the pair of second thermal management components 51.

[0112] In some embodiments, the size of the second thermal management component 51 extending beyond the first surface 521 is equal to the size of the second thermal management component 51 extending beyond the second surface 522.

[0113] In other embodiments, along the first direction Z, one end of the second thermal management component 51 can only protrude from one of the first surface 521 and the second surface 522, and the other end does not protrude from the other of the first surface 521 and the second surface 522. For example, one end of the second thermal management component 51 protrudes from the first surface 521, and the other end does not protrude from the second surface 522. A pair of the second thermal management component 51 and the first thermal management component 52 are connected in sequence to form an n-shaped structure. At this time, along the second direction Y, two second thermal management components 51 are respectively located on both sides of the first layer of battery monomers 10, the first layer of battery monomers 10 is located between the pair of second thermal management components 51, and the second layer of battery monomers 20 does not have second thermal management components 51 on both sides and is not between the pair of second thermal management components 51.

[0114] In the embodiment, the two ends of the second thermal management component 51 respectively protrude from the first surface 521 and the second surface 522, the first layer of battery monomers 10 is located between the pair of second thermal management components 51, which can improve the thermal management effect of the thermal management assembly 50 on the first layer of battery monomers 10. The second layer of battery monomers 20 is located between the pair of second thermal management components 51, which can improve the thermal management effect of the thermal management assembly 50 on the second layer of battery monomers 20, thereby balancing the internal temperature of the battery 100 and improving the reliability of the battery 100.

[0115] Referring to FIG. 4, and in combination with FIG. 5, in some embodiments, the first thermal conductive adhesive 60 includes a first part 61 and a second part 62. The first layer of battery monomers 10 is connected with the first thermal management component 52 through the first part 61, and the first layer of battery monomers 10 is connected with the second thermal management component 51 through the second part 62.

[0116] Understandably, the first part 61 of the first thermal conductive adhesive 60 is arranged on the first surface 521, and the first part 61 is located between the first layer of battery monomers 10 and the first thermal management component 52. The second part 62 of the first thermal conductive adhesive 60 is located between the first layer of battery monomers 10 and the second thermal management component 51.

[0117] The first part 61 and the second part 62 can be connected with each other, or the first part 61 and the second part 62 can be separated. For example, the first part 61 and the second part 62 can be connected with each other.

[0118] In the embodiment, the first part 61 is located between the first layer of battery monomers 10 and the first thermal management component 52 to improve the heat exchange efficiency between the first thermal management component 52 and the first layer of battery monomers 10. The second part 62 is located between the first layer of battery monomers 10 and the second thermal management component 51 to improve the heat exchange efficiency between the second thermal management component 51 and the first layer of battery monomers 10.

[0119] Referring to FIG. 4, and in combination with FIG. 5, in some embodiments, the second thermal conductive glue 70 includes a third portion 71 and a fourth portion 72, the second layer of battery cells 20 is connected with the first thermal management component 52 through the third portion 71, and the second layer of battery cells 20 is connected with the second thermal management component 51 through the fourth portion 72.

[0120] It can be understood that the third portion 71 of the second thermal conductive glue 70 is arranged on the second surface 522, the third portion 71 is located between the second layer of battery cells 20 and the first thermal management component 52, and the fourth portion 72 of the second thermal conductive glue 70 is located between the second layer of battery cells 20 and the second thermal management component 51.

[0121] Herein, the third portion 71 and the fourth portion 72 can be connected with each other, or the third portion 71 and the fourth portion 72 can be separated. For example, the third portion 71 and the fourth portion 72 can be connected with each other.

[0122]

[0123] In the present embodiment, the third portion 71 is located between the second layer of battery cells 20 and the first thermal management component 52, so as to improve the heat exchange efficiency between the first thermal management component 52 and the second layer of battery cells 20. The fourth portion 72 is located between the second layer of battery cells 20 and the second thermal management component 51, so as to improve the heat exchange efficiency between the second thermal management component 51 and the second layer of battery cells 20.

[0124] In the case that the two ends of the second thermal management component 51 respectively exceed the first surface 521 and the second surface 522 along the first direction Z.

[0125] Referring to FIG. 2, FIG. 3, and FIG. 4, in some embodiments, the battery 100 further includes a first cover 30 and a second cover 40. The first cover 30 is connected to the second thermal management component 51, and along the first direction Z, the first layer of battery cells 10 is located between the first cover 30 and the first thermal management component 52. The second cover 40 is connected to the second thermal management component 51, and along the first direction Z, the first cover 30 and the second cover 40 are oppositely arranged, the first thermal management component 52 is located between the first cover 30 and the second cover 40, and the second layer of battery cells 20 is located between the second cover 40 and the first thermal management component 52.

[0126] The first cover 30 and the second cover 40 can have the same or different structures and materials. The material of the thermal management assembly 50 can be various, such as copper, iron, aluminum, steel, aluminum alloy, plastic, etc.

[0127] For example, the first cover 30 and the second cover 40 are both configured as a single-side open cover. It should be understood that in other embodiments, the first cover 30 and / or the second cover 40 can also be configured as a plate structure.

[0128] The connection between the first cover 30 and the second thermal management component 51 can include but is not limited to a flange connection, bonding, etc. The first cover 30 and the second thermal management component 51 can also be sealed by a sealing member (not shown in the figure).

[0129] The connection between the second cover 40 and the second thermal management component 51 can include but is not limited to a flange connection, bonding, etc. The second cover 40 and the second thermal management component 51 can also be sealed by another sealing member (not shown in the figure).

[0130] In the embodiment, the first layer of battery monomers 10 is located between the first cover 30 and the first thermal management component 52, which reduces the risk of damage to the first layer of battery monomers 10 and improves the maintainability of the first layer of battery monomers 10. The second layer of battery monomers 20 is located between the second cover 40 and the first thermal management component 52, which reduces the risk of damage to the second layer of battery monomers 20 and improves the maintainability of the second layer of battery monomers 20.

[0131] Referring to FIG. 5 and FIG. 2, in some embodiments, the first layer of battery monomers 10 includes a plurality of first battery modules 11 arranged at intervals along a second direction Y perpendicular to the first direction Z. The thermal management assembly 50 includes a first thermal management component 52 and a third thermal management component 53. Along the first direction Z, the first thermal management component 52 is located between the first layer of battery monomers 10 and the second layer of battery monomers 20. The third thermal management component 53 is arranged on the first thermal management component 52 and located between two adjacent first battery modules 11.

[0132] As shown in FIG. 4, the third thermal management component 53 is internally formed with a third flow channel 531 accommodating a heat exchange medium.

[0133] The material of the third thermal management component 53 can be the same as or different from that of the first thermal management component 52.

[0134] In some embodiments, the third thermal management component 53 divides the first surface 521 into a plurality of areas to respectively place the first battery modules 11. At this time, the third thermal management component 53 can be understood as a separation beam or a module mounting beam.

[0135] The third thermal management component 53 can increase the heat exchange area between the thermal management assembly 50 and the first battery modules 11 and improve the heat exchange efficiency.

[0136] In some embodiments, the first thermal conductive adhesive 60 includes a first portion 61 and a fifth portion 63. The first battery modules 11 are connected to the first thermal management component 52 through the first portion 61, and the first battery modules 11 are connected to the third thermal management component 53 through the fifth portion 63.

[0137] Understandably, the first portion 61 is located between the first thermal management component 52 and the first battery module 11, and the fifth portion 63 is located between the first battery module 11 and the third thermal management component 53.

[0138] The material of the first portion 61 and the fifth portion 63 can be the same or different. The first portion 61 and the fifth portion 63 can be connected to each other or separately arranged.

[0139] In the embodiment, the first portion 61 is located between the first battery module 11 and the first thermal management component 52 to improve the heat exchange efficiency between the first thermal management component 52 and the first battery module 11. The fifth portion 63 is located between the first battery module 11 and the third thermal management component 53 to improve the heat exchange efficiency between the third thermal management component 53 and the first battery module 11.

[0140] In some embodiments, the first thermal management component 52 and the third thermal management component 53 are integrally formed. The integral forming process includes but is not limited to injection molding, extrusion molding, etc.

[0141] The first thermal management component 52 and the third thermal management component 53 are integrally formed, which can obtain a thermal management assembly 50 with high structural strength.

[0142] In some embodiments, the first thermal management component 52 and the third thermal management component 53 are welded. The welding method includes but is not limited to laser welding, friction stir welding, brazing, etc. Optionally, the first thermal management component 52 and the third thermal management component 53 are welded by friction stir welding.

[0143] The first thermal management component 52 and the third thermal management component 53 can reduce the difficulty of manufacturing the thermal management assembly 50.

[0144] Referring to FIG. 5, and in combination with FIG. 2, in some embodiments, the second layer of battery monomers 20 includes a plurality of second battery modules 21 arranged at intervals along the second direction Y. The thermal management assembly 50 further includes a fourth thermal management component 54 arranged between the first thermal management component 52 and between two adjacent second battery modules 21.

[0145] As shown in FIG. 4, the fourth thermal management component 54 is internally formed with a fourth flow channel 541 for accommodating the heat exchange medium.

[0146] The material of the fourth thermal management component 54 and the first thermal management component 52 can be the same or different.

[0147] In some embodiments, as shown in FIG. 6, the fourth thermal management component 54 divides the second surface 522 into a plurality of areas to respectively place the second battery modules 21. At this time, the fourth thermal management component 54 can be understood as a separation beam or a module mounting beam.

[0148] In the embodiment, the fourth thermal management component 54 can increase the heat exchange area between the thermal management assembly 50 and the second battery module 21, and increase the heat exchange efficiency.

[0149] Referring to FIG. 4, in some embodiments, the second thermal conductive adhesive 70 includes a third portion 71 and a sixth portion 73. The second battery module 21 is connected with the first thermal management component 52 through the third portion 71, and the second battery module 21 is connected with the fourth thermal management component 54 through the sixth portion 73.

[0150] Understandably, the third portion 71 is located between the first thermal management component 52 and the second battery module 21, and the sixth portion 73 is located between the second battery module 21 and the third thermal management component 53.

[0151] The third portion 71 and the sixth portion 73 can be made of the same material or different materials. The third portion 71 and the sixth portion 73 can be connected with each other or separately arranged.

[0152] In the embodiment, the third portion 71 is located between the second battery module 21 and the first thermal management component 52, so as to increase the heat exchange efficiency between the first thermal management component 52 and the second battery module 21. The sixth portion 73 is located between the second battery module 21 and the fourth thermal management component 54, so as to increase the heat exchange efficiency between the fourth thermal management component 54 and the second battery module 21.

[0153] In some embodiments, the first thermal management component 52 and the fourth thermal management component 54 are integrally formed. The integrally forming process can refer to the first thermal management component 52 and the third thermal management component 53, which will not be described herein.

[0154] The integrally forming of the first thermal management component 52 and the fourth thermal management component 54 can obtain a thermal management assembly 50 with high structural strength.

[0155] In some embodiments, the first thermal management component 52 and the fourth thermal management component 54 are welded. The welding method can refer to the first thermal management component 52 and the third thermal management component 53, which will not be described herein.

[0156] The welding of the first thermal management component 52 and the fourth thermal management component 54 can reduce the preparation difficulty of the thermal management assembly 50.

[0157] FIG. 7 is a structural schematic view of the thermal management assembly 50 and the end wall 80 according to some embodiments of the present application.

[0158] Referring to FIG. 7, FIG. 2 and FIG. 3, in some embodiments, the battery 100 further comprises a pair of end walls 80, which are arranged in the third direction X, and the first thermal management component 52 is located between the pair of end walls 80, and each end wall 80 is connected to a pair of second thermal management components 51 at two ends thereof, and the third direction X, the second direction Y and the first direction Z are perpendicular to each other.

[0159] The first cover 30, the second cover 40, the pair of end walls 80 and the pair of second thermal management components 51 enclose a containing cavity. The first thermal management component 52 divides the containing cavity into a first cavity 91 and a second cavity 92, and the first layer of battery monomers 10 is contained in the first cavity 91, and the second layer of battery monomers 20 is contained in the second cavity 92.

[0160] Understandably, the pair of end walls 80, the pair of second thermal management components 51, the first cover 30 and the second cover 40 enclose the peripheral structure of the battery 100. Taking the rectangular battery 100 as an example, the pair of second thermal management components 51 and the pair of end walls 80 can be configured as rectangular plates, and the pair of second thermal management components 51 and the pair of end walls 80 are connected in sequence to form a rectangular frame with two open ends, and the first cover 30 and the second cover 40 are respectively covered on the two openings of the rectangular frame.

[0161] In some embodiments, as shown in FIG. 7, along the first direction Z, the two ends of the end wall 80 form a first outward turning edge 81 and a second outward turning edge 82, respectively, the first outward turning edge 81 is used to connect with the first cover 30, and the second outward turning edge 82 is used to connect with the second cover 40.

[0162] In some embodiments, the first cavity 91 and the second cavity 92 are not communicated, and the first cavity 91 and the second cavity 92 are two independent cavities, which can alleviate the influence of the thermal runaway of one cavity on the other cavity. Of course, in other embodiments, the first cavity 91 and the second cavity 92 can also be communicated with each other to balance the temperature inside the battery 100.

[0163] In some embodiments, the thermal management assembly 50 is used to carry the second layer of battery monomers 20. Carrying means that the thermal management assembly 50 bears the gravity of the second layer of battery monomers 20, and the thermal management assembly 50 applies a force to the second layer of battery monomers 20 to overcome the gravity. At this time, other supporting plates can be provided, or end plates can be used, or the first cover 30 can be used, or other walls of the box body can be relied on to carry the first layer of battery monomers 10.

[0164] In some embodiments, the thermal management assembly 50 is used to carry the first layer of battery monomers 10 and the second layer of battery monomers 20. That is, the thermal management assembly 50 simultaneously provides a force to overcome the gravity for the first layer of battery monomers 10 and the second layer of battery monomers 20. Understandably, the thermal management assembly 50 plays a role of heat management and a role of support at the same time.

[0165] Referring to FIGS. 2 and 3, in some embodiments, the first layer of battery cells 10 includes a plurality of first battery cells 101, and an end of the first battery cells 101 facing away from the second layer of battery cells 20 is provided with a first electrode terminal 1011 along the first direction Z. The second layer of battery cells 20 includes a plurality of second battery cells 201, and an end of the second battery cells 201 facing away from the first layer of battery cells 10 is provided with a second electrode terminal 2011 along the first direction Z.

[0166] Understandably, the first electrode terminal 1011 and the second electrode terminal 2011 are opposite to each other.

[0167] The first electrode terminal 1011 is a metal component for leading out the current of the first battery cell 101. Exemplarily, the first battery cell 101 is provided with two first electrode terminals 1011 of opposite polarities, and the two first electrode terminals 1011 are located on the same side. The material of the first electrode terminal 1011 includes but is not limited to copper, aluminum, etc.

[0168] The second electrode terminal 2011 is a metal component for leading out the current of the second battery cell 201. Exemplarily, the second battery cell 201 is provided with two second electrode terminals 2011 of opposite polarities, and the two second electrode terminals 2011 are located on the same side. The material of the second electrode terminal 2011 includes but is not limited to copper, aluminum, etc.

[0169] By providing the first electrode terminal 1011 at the end of the first battery cell 101 facing away from the second layer of battery cells 20 and providing the second electrode terminal 2011 at the end of the second battery cell 201 facing away from the first layer of battery cells 10, the first electrode terminal 1011 and the second electrode terminal 2011 are far away from each other, which can reduce the risk of short circuit between the first layer of battery cells 10 and the second layer of battery cells 20 and improve the electrical reliability.

[0170] In the case where the thermal management assembly 50 carries the first layer of battery cells 10, in some embodiments, referring to FIGS. 3 and 4, the first layer of battery cells 10 is provided with a gap from the first cover 30 to form a buffer space on this side.

[0171] FIG. 8 is an exploded schematic view of the first cover 30 according to some embodiments of the present application.

[0172] Referring to FIG. 8, further, in some embodiments, the first cover 30 includes a first cover body 31 and a first inner layer plate 32 stacked together, the first inner layer plate 32 is arranged on the side of the first cover body 31 facing the first layer of battery cells 10, and the first inner layer plate 32 has a gap from the first battery cells 101.

[0173] The first inner layer plate 32 can be configured in a circular shape, a rectangular shape, or a special shape, etc. Exemplarily, the first inner layer plate 32 is configured as a rectangular plate. The first inner layer plate 32 can be made of an insulating material to reduce the risk of short circuit between the first layer of battery monomers 10 and the first cover 30, and to protect the inside of the box from corrosion. In order to improve the structural consistency of the box, a sheet metal stamping can also be used to prepare the first inner layer plate 32 by setting an insulating layer on the surface of the sheet metal.

[0174] The first cover body 31 is the peripheral structure of the first cover 30, and the first cover body 31 can be configured as a one-side open cover structure. The first cover body 31 can also be configured as a plate shape.

[0175] In the case that the first cover 30 is located at the bottom of the battery 100, the bottom protection needs to be considered. At this time, the first cover body 31 can adopt a crash-resistant structure and set a reinforcing rib to improve the structural strength of the first cover 30.

[0176] In some embodiments, the first cover body 31 can be stamped from a steel plate to improve the structural strength of the first cover 30.

[0177] In some embodiments, the first cover body 31 can be made of a lightweight alloy material, such as an aluminum alloy, to meet the lightweight design.

[0178] In some embodiments, the first cover 30 includes the first cover body 31 and the first inner layer plate 32, which can improve the maintainability of the first cover 30.

[0179] In some embodiments, the first cover 30 further includes a first buffer layer 33, and the first buffer layer 33 is arranged between the first cover body 31 and the first inner layer plate 32.

[0180] The first buffer layer 33 is a component with elasticity. The first buffer layer 33 is a sandwich layer between the first cover body 31 and the first inner layer plate 32. The material of the first buffer layer 33 includes but is not limited to rubber, silicone, polyurethane, polyethylene, foam, etc. Optionally, the first buffer layer 33 is hard rubber, which has good elasticity, durability and buffering capacity.

[0181] The first buffer layer 33 can absorb or disperse external impact force, further reducing the risk of damage to the first layer of battery monomers 10.

[0182] In some embodiments, the first buffer layer 33 is bonded to the first inner layer plate 32. The bonding material includes but is not limited to double-sided tape, structural adhesive, etc.

[0183] The first buffer layer 33 is bonded to the first inner layer plate 32, which improves the connection stability of the first buffer layer 33 and the first inner layer plate 32, and the connection method is simple.

[0184] The structure of the second cover body 40 can be the same as or different from that of the first cover body 30 according to specific design requirements. For example, if the battery 100 is used in a vehicle 1000, the first cover body 30 needs to resist external impact, and the use of the above-described first cover body 30 can improve the protection performance of the bottom wall of the box body. The second cover body 40 is located at the top, and the possibility of impact is low. At this time, the second cover body 40 can be made of plastic or other materials that meet the lightweight index.

[0185] In some embodiments, the first direction Z is parallel to the direction of gravity.

[0186] The embodiments of the present application provide a battery 100, which is used to power the electric device.

[0187] The embodiments of the present application also provide a battery 100, which includes a first layer of battery monomers 10, a second layer of battery monomers 20, a thermal management assembly 50, a first cover body 30, a second cover body 40, and a pair of end walls 80.

[0188] The first layer of battery monomers 10 and the second layer of battery monomers 20 are arranged in a first direction Z, and the first direction Z is parallel to the direction of gravity. The first layer of battery monomers 10 includes a plurality of first battery monomers 101, which are fixedly integrated into a plurality of first battery modules 11.

[0189] The second layer of battery monomers 20 includes a plurality of second battery monomers 201, which are fixedly integrated into a plurality of second battery modules 21.

[0190] The thermal management assembly 50 includes a first thermal management component 52, a pair of second thermal management components 51, a third thermal management component 53, and a fourth thermal management component 54, which are integrally formed. The first thermal management component 52 is located between the first layer of battery monomers 10 and the second layer of battery monomers 20, and the pair of second thermal management components 51 are arranged in a second direction Y. The first thermal management component 52 is located between the pair of second thermal management components 51. The first thermal management component 52 has opposite first and second surfaces 521 and 522 along its thickness direction, the first surface 521 is the lower surface, and the second surface 522 is the upper surface. Along the first direction Z, the two ends of the second thermal management component 51 respectively extend beyond the first and second surfaces 521 and 522. The inside of the first thermal management component 52 forms a first flow channel 523 for containing a heat exchange medium, the inside of the second thermal management component 51 forms a second flow channel 511 for containing a heat exchange medium, the inside of the third thermal management component 53 forms a third flow channel 531 for containing a heat exchange medium, and the inside of the fourth thermal management component 54 forms a fourth flow channel 541 for containing a heat exchange medium.

[0191] The first layer of battery cells 10 is adhered to the first surface 521 by a thermally conductive adhesive, the first layer of battery cells 10 is adhered to the second thermal management component 51 by a thermally conductive adhesive, and the first layer of battery cells 10 is adhered to the third thermal management component 53 by a thermally conductive adhesive. The second layer of battery cells 20 is adhered to the second surface 522 by a thermally conductive adhesive, the second layer of battery cells 20 is adhered to the second thermal management component 51 by a thermally conductive adhesive, and the second layer of battery cells 20 is adhered to the fourth thermal management component 54 by a thermally conductive adhesive. In the second direction Y, the first layer of battery cells 10 and the second layer of battery cells 20 are both located between a pair of second thermal management components 51.

[0192] The third thermal management component 53 is connected to the first thermal management component 52 and protrudes from the first surface 521, and the third thermal management component 53 is located between two adjacent first battery modules 11. Each first battery module 11 is adhered to the third thermal management component 53 by a thermally conductive adhesive.

[0193] The fourth thermal management component 54 is connected to the first thermal management component 52 and protrudes from the second surface 522, and the fourth thermal management component 54 is located between two adjacent second battery modules 21. Each second battery module 21 is connected to the fourth thermal management component 54 by a thermally conductive adhesive.

[0194] A pair of end walls 80 are arranged in the third direction X, and the first thermal management component 52 is located between the pair of end walls 80. Each end wall 80 is connected to a pair of second thermal management components 51 at both ends. The first cover 30 is connected to the pair of second thermal management components 51 and the pair of end walls 80, and the second cover 40 is connected to the pair of second thermal management components 51 and the pair of second thermal management components 51. The first cover 30, the second cover 40, the pair of end walls 80, and the pair of second thermal management components 51 enclose a receiving cavity, and the first thermal management component 52 divides the receiving cavity into a first cavity 91 and a second cavity 92. The first layer of battery cells 10 is accommodated in the first cavity 91, and the second layer of battery cells 20 is accommodated in the second cavity 92.

[0195] The thermal management assembly 50 is configured to carry the first layer of battery cells 10 and the second layer of battery cells 20, and the thermal management assembly 50 is further configured to regulate the temperature of the first layer of battery cells 10 and the second layer of battery cells 20.

[0196] The first electrode terminal 1011 is arranged at one end of the first battery cell 101 away from the thermal management assembly 50, and is located at the bottom of the first battery cell 101. The second electrode terminal 2011 is arranged at one end of the second battery cell 201 away from the thermal management assembly 50, and is located at the top of the second battery cell 201. The first layer of battery cells 10 and the second layer of battery cells 20 are mirror images of each other, and the mirror plane of the first layer of battery cells 10 and the second layer of battery cells 20 is parallel to the plane formed by the second direction Y and the third direction X.

[0197] The first cover 30 includes a first cover body 31, a first inner layer plate 32, and a first buffer layer 33. The first inner layer plate 32 is arranged on the side of the first cover body 31 facing the first layer of battery cells 10, and a gap is formed between the first inner layer plate 32 and the first battery cell 101. The first buffer layer 33 is arranged between the first cover body 31 and the first inner layer plate 32 and the thermal management assembly 50. The first buffer layer 33 is a rubber layer. The first cover body 31 is stamped from sheet metal, the first inner layer plate 32 is stamped from sheet metal, and the first inner layer plate 32 is welded to the first cover body 31.

[0198] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0199] The above embodiments are only used to illustrate the technical solutions of the present application, and are not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A battery, characterized by, Comprise; a first layer of battery cells and a second layer of battery cells, the first layer of battery cells and the second layer of battery cells being arranged in a first direction in a stack; a thermal management assembly, at least a portion of the thermal management assembly being located between the first layer of battery cells and the second layer of battery cells; wherein the first layer of battery cells and the second layer of battery cells are each in thermal conductive connection with the thermal management assembly, the thermal management assembly being configured to regulate a temperature of the first layer of battery cells and the second layer of battery cells.

2. The battery of claim 1, wherein, The first layer of battery cells is connected to the thermal management assembly by a first thermal conductive adhesive, and the second layer of battery cells is connected to the thermal management assembly by a second thermal conductive adhesive.

3. The battery of claim 2, wherein, The thermal management assembly comprises: a first thermal management component, the first thermal management component being located between the first layer of battery cells and the second layer of battery cells in the first direction; a pair of second thermal management components, the pair of second thermal management components being spaced apart in a second direction, the first thermal management component connecting the pair of second thermal management components, the second direction being perpendicular to the first direction.

4. The battery of claim 3, wherein, The first thermal management component and the second thermal management component are integrally formed or welded.

5. The battery according to claim 3 or 4, characterized in that, In the first direction, the first thermal management component has oppositely arranged first and second surfaces, and two ends of the second thermal management component respectively extend beyond the first and second surfaces; In the second direction, the first layer of battery cells and the second layer of battery cells are located between the pair of second thermal management components.

6. The battery of claim 5, wherein, The first thermal conductive adhesive comprises a first portion and a second portion, the first layer of battery cells being connected to the first thermal management component by the first portion, and the first layer of battery cells being connected to the second thermal management component by the second portion.

7. The battery according to claim 5 or 6, characterized in that The second thermal conductive adhesive comprises a third portion and a fourth portion, the second layer of battery cells being connected to the first thermal management component by the third portion, and the second layer of battery cells being connected to the second thermal management component by the fourth portion.

8. The battery of any one of claims 5-7, wherein, The battery further comprises: a first cover body connected to the second thermal management component, in the first direction, the first layer of battery cells being located between the first cover body and the first thermal management component; a second cover body connected to the second thermal management component, in the first direction, the first cover body and the second cover body being oppositely arranged, the first thermal management component being located between the first cover body and the second cover body, and the second layer of battery cells being located between the second cover body and the first thermal management component.

9. The battery of claim 3, wherein, The first layer of battery cells comprises a plurality of first battery modules spaced apart in a second direction, the second direction being perpendicular to the first direction; The thermal management assembly further comprises: a third thermal management component arranged on the first thermal management component and located between two adjacent first battery modules.

10. The battery of claim 2, wherein, The first layer of battery cells comprises a plurality of first battery modules spaced apart in a second direction, the second direction being perpendicular to the first direction; The thermal management assembly further comprises: a first thermal management component, located between the first layer of battery cells and the second layer of battery cells along the first direction; a third thermal management component, disposed on the first thermal management component and between two adjacent first battery modules.

11. The battery according to claim 9 or 10, characterized in that, The first thermal conductive adhesive comprises a first portion and a fifth portion, the first battery module is connected with the first thermal management component through the first portion, and the first battery module is connected with the third thermal management component through the fifth portion.

12. The battery of any one of claims 9-11, wherein, The first thermal management component and the third thermal management component are integrally formed or welded.

13. The battery of any one of claims 9-12, wherein, The second layer of battery cells comprises a plurality of second battery modules arranged at intervals along the second direction; The thermal management assembly further comprises: a fourth thermal management component, disposed on the first thermal management component and between two adjacent second battery modules.

14. The battery of claim 13, wherein, The second thermal conductive adhesive comprises a third portion and a sixth portion, the second battery module is connected with the first thermal management component through the third portion, and the second battery module is connected with the fourth thermal management component through the sixth portion.

15. The battery according to claim 13 or 14, characterized in that The first thermal management component and the fourth thermal management component are integrally formed or welded.

16. The battery of any one of claims 1-15, wherein, The first layer of battery cells comprises a plurality of first battery cells, and an end of the first battery cell away from the second layer of battery cells is provided with a first electrode terminal along the first direction. The second layer of battery cells comprises a plurality of second battery cells, and an end of the second battery cell away from the first layer of battery cells is provided with a second electrode terminal along the first direction.

17. The battery of any one of claims 1-16, wherein, The first direction is parallel to the direction of gravity.

18. An electrical device, comprising: The battery of any one of claims 1-17 is used to power the electrical device.

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