Battery and electric equipment

Abstract

The utility model discloses a battery and electric equipment. The battery includes a first layer of battery cells, a second layer of battery cells, and a thermal management assembly. 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. Wherein the first layer of battery monomers and the second layer of battery monomers are in heat conduction connection with the heat management assembly, and the heat management assembly is used for adjusting the temperature of the first layer of battery monomers and the second layer of battery monomers. And the energy density of the battery can be effectively improved.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and more particularly, to a battery and an electrical device using the same. Background Art

[0002] With the development of new energy technologies, batteries are increasingly widely used. Batteries with high energy density, high safety, long service life, and environmental friendliness have been widely applied in passenger cars, commercial vehicles, electric bicycles, heavy trucks, energy storage facilities, battery swapping stations, engineering manufacturing, intelligent devices, etc. At the same time, they have also promoted the technological development and research in the fields of communication terminals, medical devices, energy development, etc.

[0003] In battery technologies, how to improve the energy density of batteries is a technical problem that urgently needs to be solved. Summary of the Utility Model

[0004] The embodiments of the present application provide a battery and an electrical device using the same, which can effectively improve the energy density of the battery.

[0005] In a first aspect, the embodiments of the present application provide a battery, which includes a first-layer battery cell, a second-layer battery cell, and a thermal management component. The first-layer battery cell and the second-layer battery cell are stacked along a first direction; at least a part of the thermal management component is located between the first-layer battery cell and the second-layer battery cell;

[0006] wherein, both the first-layer battery cell and the second-layer battery cell are thermally connected to the thermal management component, and the thermal management component is used to adjust the temperatures of the first-layer battery cell and the second-layer battery cell.

[0007] In the above technical solution, the first-layer battery cell and the second-layer battery cell share the thermal management component, which simplifies the number of thermal management components provided, and the battery has a high integration degree, which is beneficial to improving the energy density of the battery.

[0008] In some embodiments, the first-layer battery cell is connected to the thermal management component through a first thermal conductive adhesive, and the second-layer battery cell is connected to the thermal management component through a second thermal conductive adhesive.

[0009] In the above technical solution, the first thermal conductive adhesive can improve the heat exchange efficiency between the first-layer battery cell and the thermal management component, and the second thermal conductive adhesive can improve the heat exchange efficiency between the second-layer battery cell and the thermal management component, thereby improving the thermal management effect and the reliability of the battery.

[0010] 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 battery cells and the second-layer battery cells; the pair of second thermal management parts are arranged at intervals along a second direction, 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.

[0011] In the above technical solution, a thermal management component with higher structural strength and larger heat exchange area can be obtained.

[0012] In some embodiments, the first thermal management part and the second thermal management part are integrally formed or welded.

[0013] In the above 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. Welding the first thermal management part and the second thermal management part can reduce the manufacturing difficulty of the thermal management component.

[0014] In some embodiments, along the first direction, the first thermal management part has a first surface and a second surface arranged oppositely, and both ends of the second thermal management part extend beyond the first surface and the second surface respectively;

[0015] Along the second direction, the first-layer battery cells and the second-layer battery cells are located between the pair of second thermal management parts.

[0016] In the above technical solution, the first-layer battery cells are 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 battery cells. The second-layer battery cells are 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 battery cells, thereby balancing the internal temperature of the battery and improving the battery reliability.

[0017] In some embodiments, the first thermal conductive adhesive includes a first part and a second part, the first-layer battery cells are connected to the first thermal management part through the first part, and the first-layer battery cells are connected to the second thermal management part through the second part.

[0018] In the above technical solution, the first part is located between the first-layer battery cells and the first thermal management part to improve the heat exchange efficiency between the first thermal management part and the first-layer battery cells. The second part is located between the first-layer battery cells and the second thermal management part to improve the heat exchange efficiency between the second thermal management part and the first-layer battery cells.

[0019] In some embodiments, the second thermal conductive adhesive includes a third part and a fourth part. The second-layer battery cell is connected to the first thermal management component through the third part, and the second-layer battery cell is connected to the second thermal management component through the fourth part.

[0020] In the above technical solution, the third part is located between the second-layer battery cell and the first thermal management component to improve the heat exchange efficiency between the first thermal management component and the second-layer battery cell. The fourth part is located between the second-layer battery cell and the second thermal management component to improve the heat exchange efficiency between the second thermal management component and the second-layer battery cell.

[0021] In some embodiments, the battery further includes a first cover and a second cover. The first cover is connected to the second thermal management component. Along the first direction, the first-layer battery cell is located between the first cover and the first thermal management component; the second cover is connected to the second thermal management component. Along the first direction, the first cover and the second cover are disposed opposite to each other, the first thermal management component is located between the first cover and the second cover, and the second-layer battery cell is located between the second cover and the first thermal management component.

[0022] In the above technical solution, the first-layer battery cell is located between the first cover and the first thermal management component, reducing the risk of damage to the first-layer battery cell and improving the maintainability of the first-layer battery cell. The second-layer battery cell is located between the second cover and the first thermal management component, reducing the risk of damage to the second-layer battery cell and improving the maintainability of the second-layer battery cell.

[0023] In some embodiments, the first-layer battery cell includes a plurality of first battery modules arranged at intervals along a second direction perpendicular to the first direction; the thermal management assembly includes a first thermal management component and a third thermal management component;

[0024] Along the first direction, the first thermal management component is located between the first-layer battery cell and the second-layer battery cell; the third thermal management component is disposed on the first thermal management component and between two adjacent first battery modules.

[0025] In the above technical solution, the third thermal management component can increase the heat exchange area between the thermal management assembly and the first battery module and improve the heat exchange efficiency.

[0026] In some embodiments, the first thermal conductive adhesive includes a first part and a fifth part. The first battery module is connected to the first thermal management component through the first part, and the first battery module is connected to the third thermal management component through the fifth part.

[0027] In the above technical solution, the first part is located between the first battery module and the first heat management component to improve the heat exchange efficiency between the first heat management component and the first battery module. The fifth part is located between the first battery module and the third heat management component to improve the heat exchange efficiency between the third heat management component and the first battery module.

[0028] In some embodiments, the first heat management component and the third heat management component are integrally formed or welded.

[0029] In the above technical solution, the first heat management component and the third heat management component are integrally formed, and a heat management assembly with relatively high structural strength can be obtained. The first heat management component and the third heat management component can reduce the preparation difficulty of the heat management assembly.

[0030] In some embodiments, the second layer of battery cells includes a plurality of second battery modules arranged at intervals along the second direction;

[0031] The heat management assembly further includes a fourth heat management component, and the fourth heat management component is disposed on the first heat management component and between two adjacent second battery modules.

[0032] In the above technical solution, the fourth heat management component can increase the heat exchange area between the heat management assembly and the second battery module and improve the heat exchange efficiency.

[0033] In some embodiments, the second thermal conductive adhesive includes a third part and a sixth part. The second battery module is connected to the first heat management component through the third part, and the second battery module is connected to the fourth heat management component through the sixth part.

[0034] In the above technical solution, the third part is located between the second battery module and the first heat management component to improve the heat exchange efficiency between the first heat management component and the second battery module. The sixth part is located between the second battery module and the fourth heat management component to improve the heat exchange efficiency between the fourth heat management component and the second battery module.

[0035] In some embodiments, the first heat management component and the fourth heat management component are integrally formed or welded.

[0036] In the above technical solution, the first heat management component and the fourth heat management component being integrally formed can obtain a heat management assembly with relatively high structural strength. The first heat management component and the fourth heat management component being welded can reduce the preparation difficulty of the heat management assembly.

[0037] In some embodiments, the first layer of battery cells includes a plurality of first battery cells, and along the first direction, a first electrode terminal is provided at one end of the first battery cell facing away from the second layer of battery cells;

[0038] The second layer of battery cells includes a plurality of second battery cells. Along the first direction, a second electrode terminal is provided at one end of the second battery cell facing away from the first layer of battery cells.

[0039] In the above technical solution, by arranging the first electrode terminal at one end of the first battery cell facing away from the second layer of battery cells and the second electrode terminal at one end of the second battery cell facing away from the first layer of battery cells, the first electrode terminal and the second electrode terminal are relatively far apart, which can reduce the short - circuit risk between the first layer of battery cells and the second layer of battery cells and improve electrical reliability.

[0040] In some embodiments, the first direction is parallel to the direction of gravity.

[0041] In a second aspect, an embodiment of the present application provides an electrical device, and the electrical device includes the above - mentioned battery, and the battery is used to supply power to the electrical device. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present application, so they should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other relevant drawings can also be obtained based on these drawings.

[0043] Figure 1 It is a schematic structural diagram of a vehicle according to some embodiments of the present application;

[0044] Figure 2 It is an exploded schematic diagram of a battery according to some embodiments of the present application;

[0045] Figure 3 It is a cross - sectional view of a battery according to some embodiments of the present application;

[0046] Figure 4 It is a cross - sectional view of a battery according to some other embodiments of the present application;

[0047] Figure 5 It is a schematic structural diagram of a thermal management component according to some embodiments of the present application;

[0048] Figure 6 It is a schematic structural diagram of a thermal management component according to some other embodiments of the present application;

[0049] Figure 7 It is a schematic structural diagram of a thermal management component and an end wall according to some embodiments of the present application;

[0050] Figure 8 It is an exploded schematic diagram of a first cover according to some embodiments of the present application.

[0051] Icons: 100 - battery; 10 - first - layer battery cell; 11 - first battery module; 101 - first battery cell; 1011 - first electrode terminal; 20 - second - layer battery cell; 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 component; 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 adhesive; 61 - first part; 62 - second part; 63 - fifth part; 70 - second thermal conductive adhesive; 71 - third part; 72 - fourth part; 73 - sixth part; 80 - end wall; 81 - first outward - turned edge; 82 - second outward - turned edge; 91 - first cavity; 92 - second cavity; 1000 - vehicle; 200 - motor; 300 - controller; Z - first direction; Y - second direction; X - third direction.

[0052] The drawings are not drawn to actual scale. Detailed implementation manners

[0053] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly described below with reference to the accompanying drawings in the embodiments of this application. Apparently, the described embodiments are some, but not all, of the embodiments of this application. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this application.

[0054] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above - mentioned drawings are intended to cover non - exclusive inclusion. The terms "first", "second", etc. in the specification and claims of this application or the above - mentioned drawings are used to distinguish different objects and are not used to describe a specific order or primary - secondary relationship.

[0055] References to "embodiments" in this application mean that the specific features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of this application. The phrase appearing in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments.

[0056] In the description of this application, it should be noted that unless otherwise clearly specified and defined, the terms "install", "connect", "attach" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0057] In the description of this application, it should be noted that unless otherwise stated, the meaning of "a plurality of" is two or more; the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to this application. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. "Vertical" is not strictly vertical, but within the allowable error range. "Parallel" is not strictly parallel, but within the allowable error range.

[0058] The term "and / or" in this application is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally represents an "or" relationship between the associated objects before and after.

[0059] In the embodiments of this application, the same reference numerals represent the same components, and for the sake of brevity, in different embodiments, the detailed description of the same components is omitted. It should be understood that the thickness, length, width, and other dimensions of various components shown in the drawings in the embodiments of this application, as well as the overall thickness, length, width, and other dimensions of the integrated device, are only for illustrative purposes and should not constitute any limitation to this application.

[0060] The "a plurality of" appearing in this application refers to two or more (including two).

[0061] In this application, the battery cell may include, but is not limited to, lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, magnesium-ion batteries, etc. The battery cell includes, but is not limited to, cylindrical, flat, cuboid or other shapes. Generally, the battery cell includes cylindrical battery cells, square battery cells, pouch battery cells, etc. in a packaged manner. The battery cell can also be a blade battery.

[0062] Exemplarily, the battery cell includes an electrode assembly and an electrolyte. The electrode assembly is composed of a positive electrode sheet, a negative electrode sheet and a separator. The battery cell mainly works by the movement of metal ions between the positive electrode sheet and the negative electrode sheet. Metal ions (such as lithium ions) are embedded and extracted back and forth between the positive electrode and the negative electrode. The separator is arranged between the positive electrode and the negative electrode, which can prevent the short circuit between the positive electrode sheet and the negative electrode sheet, and at the same time allow active ions to pass through.

[0063] 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. The positive electrode current collector without the coated positive electrode active material layer protrudes from the positive electrode current collector with the coated positive electrode active material layer. The positive electrode current collector without the coated positive electrode active material layer serves as the positive electrode tab.

[0064] Taking a lithium-ion battery as an example, the positive electrode active material can be lithium cobaltate, lithium iron phosphate, ternary lithium, lithium manganate, etc. The positive electrode current collector can be made of a metal foil or a composite current collector. For example, as a metal foil, aluminum with a silver-plated surface, stainless steel with a silver-plated surface, stainless steel, copper, aluminum, carbon electrode, carbon, nickel or titanium, etc. can be used. The composite current collector can include a polymer material substrate layer and a metal layer. The composite current collector can be formed by forming a metal material (such as aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0065] 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. The negative electrode current collector without the coated negative electrode active material layer protrudes from the negative electrode current collector with the coated negative electrode active material layer. The negative electrode current collector without the coated negative electrode active material layer serves as the negative electrode tab.

[0066] The negative electrode current collector can be made of a metal foil or a composite current collector. For example, as a metal foil, aluminum with a silver-plated surface, stainless steel with a silver-plated surface, stainless steel, copper, aluminum, carbon electrode, carbon, nickel or titanium, etc. can be used. The negative electrode active material can be carbon or silicon, etc.

[0067] To ensure that large currents can pass through without fusing, multiple positive electrode tabs are stacked together, and multiple negative electrode tabs are stacked together. The material of the separator can be PP (polypropylene) or PE (polyethylene), etc. In addition, the electrode assembly can be of a wound structure or a stacked structure.

[0068] The battery mentioned 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. A battery generally includes a case for encapsulating one or more battery cells. The case can reduce the influence of liquid or other foreign objects on the charging or discharging of the battery cells.

[0069] 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.

[0070] The development of battery technology needs to consider multiple design factors simultaneously. For example, performance parameters such as energy density, cycle life, discharge capacity, charge-discharge rate, etc. In addition, the power density of the battery also needs to be considered.

[0071] In battery technology, the temperature of battery cells is usually adjusted by bottom water cooling. The more the number of battery cells, the larger the area of the required thermal management components and the more space occupied, resulting in a decrease in the energy density of the battery.

[0072] In view of this, to solve the problems of large space occupied by thermal management components 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 stacked along the gravity direction, 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 both 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 a thermal management component, simplifying the number of thermal management components provided, improving the integration of the battery, and increasing the energy density of the battery.

[0073] The technical solutions disclosed in the embodiments of the present application are applicable to, but not limited to, battery 100 and electrical equipment using battery 100.

[0074] The electrical device can be a vehicle 1000, a mobile phone, a portable device, a laptop computer, a ship, a spacecraft, an electric toy, an electric tool, and so on. The vehicle 1000 can be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle, or an extended-range electric vehicle, etc.; The spacecraft includes airplanes, rockets, space shuttles, and spaceships, etc.; Electric toys include stationary or mobile electric toys, for example, game consoles, electric vehicle toys, electric ship toys, and electric airplane toys, etc.; Electric tools include metal-cutting electric tools, grinding electric tools, assembly electric tools, and railway electric tools, for example, electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact electric drills, concrete vibrators, and electric planers, etc.

[0075] For the convenience of description, the following embodiments will take the electrical device as the vehicle 1000 as an example for illustration.

[0076] Please refer to Figure 1 , Figure 1 which is a schematic structural diagram of the vehicle 1000 according to some embodiments of the present application. A battery 100 is arranged inside the vehicle 1000, and the battery 100 can be arranged at the bottom, head, or 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 the operating power source of the vehicle 1000.

[0077] The vehicle 1000 may further include a controller 300 and a motor 200. The controller 300 is used to control the battery 100 to supply power to the motor 200. For example, it is used for the working power requirements during the start, navigation, and driving of the vehicle 1000.

[0078] In some embodiments of the present application, the battery 100 can not only be used as the operating power source of the vehicle 1000, but also be used as the driving power source of the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0079] Figure 2 which is an exploded view of the battery 100 according to some embodiments of the present application; Figure 3 which is a cross-sectional view of the battery 100 according to some embodiments of the present application.

[0080] Refer to Figure 2 and Figure 3, embodiments of the present application provide a battery 100, which includes a first layer of battery cells 10, a second layer of battery cells 20, and a thermal management component 50. The first layer of battery cells 10 and the second layer of battery cells 20 are stacked along the first direction Z. 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. Among them, both the first layer of battery cells 10 and the second layer of battery cells 20 are thermally connected to the thermal management component 50, and the thermal management component 50 is used to adjust the temperatures of the first layer of battery cells 10 and the second layer of battery cells 20.

[0081] The first layer of battery cells 10 may include a plurality of first battery cells 101, and the plurality of first battery cells 101 may be connected in series, in parallel, or in a hybrid connection. Among them, a hybrid 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 may be arranged and fixed to form one or more battery 100 modules. Exemplarily, the plurality of first battery cells 101 are arranged and fixed into four battery 100 modules.

[0082] The second layer of battery cells 20 may include a plurality of second battery cells 201, and the plurality of second battery cells 201 may be connected in series, in parallel, or in a hybrid connection. Among them, a hybrid 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 may be arranged and fixed to form one or more battery 100 modules. Exemplarily, the plurality of second battery cells 201 are arranged and fixed into four battery 100 modules.

[0083] In some embodiments, the battery 100 may further include a busbar component (not shown in the figure). The plurality of first battery cells 101 may be connected in series, in parallel, or in a hybrid connection through the busbar component. The plurality of second battery cells 201 may also be connected in series, in parallel, or in a hybrid connection through the busbar component. The busbar component may be a metal conductor, such as copper, iron, aluminum, steel, aluminum alloy, etc.

[0084] The thermal management component 50 is a component for adjusting the temperature of the battery 100 cells. A flow channel for accommodating a heat exchange medium is formed inside the thermal management component 50. The heat exchange medium may also be referred to as a cooling medium or a cooling fluid. The heat exchange medium may be a liquid or a gas. Adjusting the temperature means heating or cooling a plurality of battery 100 cells. Optionally, the fluid may be circulated to achieve a better temperature adjustment effect. Optionally, the fluid may be water, a mixture of water and ethylene glycol, or air, etc.

[0085] In some embodiments, the battery 100 may include a box body, and the box body includes two hollow cover body structures. The two cover bodies are closed together to form an accommodation space for accommodating the first side battery 100 cells and the second layer of battery cells 20.

[0086] At least a part of the thermal management component 50 is located between the first-layer battery cells 10 and the second-layer battery cells 20. It can be understood that: a part of the thermal management component 50 can be located between the first-layer battery cells 10 and the second battery 100; the thermal management component 50 can also be entirely located between the first-layer battery cells 10 and the second-layer battery cells 20. For example, the thermal management component 50 is configured as a rectangular plate, and the first-layer battery cells 10 and the second-layer battery cells 20 are arranged on both sides in the thickness direction of the rectangular plate.

[0087] The first direction Z can be the direction of gravity or a direction with an angle to the direction of gravity. For the convenience of description hereinafter, taking the rectangular battery 100 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.

[0088] In some embodiments, considering the first direction Z as the direction of gravity, the first-layer battery cells 10 and the second-layer battery cells 20 are located on the upper and lower sides of the thermal management component 50. Exemplarily, as Figure 3 shown, the first-layer battery cells 10 are arranged above, the second-layer battery 100 is arranged above, and a part of the thermal management component 50 is located between the first-layer battery cells 10 and the second-layer battery cells 20.

[0089] The thermal management component 50 is used to regulate the temperatures of the first-layer battery cells 10 and the second-layer battery cells 20, that is, the thermal management component 50 regulates both the temperature of the first-layer battery cells 10 and the temperature of the second-layer battery cells 20, and the first-layer battery cells 10 and the second-layer battery cells 20 share the thermal management component 50.

[0090] Both the first-layer battery cells 10 and the second-layer battery cells 20 are thermally connected to the thermal management component 50, which means that both the first-layer battery cells 10 and the second-layer battery cells 20 can conduct heat exchange. The thermal connection method can be direct contact or a thermal conductive medium is provided. The thermal conductive medium includes but is not limited to thermal conductive glue, thermal conductive paste, thermal conductive film, etc. Optionally, both the first-layer battery cells 10 and the second-layer battery cells 20 are connected to the thermal management component 50 through thermal conductive glue.

[0091] The material of the thermal management component 50 can be various, such as copper, iron, aluminum, aluminum and its alloys, etc. Optionally, the material of the thermal management component 50 is aluminum alloy, and copper, manganese and silicon can be added to the composition of the aluminum alloy to improve the structural performance of the thermal management component 50. For example, adding copper can improve the strength of the alloy; adding manganese can improve the corrosion resistance and strength of the aluminum alloy; adding silicon can improve the corrosion resistance and reduce the thermal expansion coefficient.

[0092] In the above embodiments, the first-layer battery cells 10 and the second-layer battery cells 20 share the thermal management component 50, which simplifies the number of thermal management components 50 provided, and the battery 100 has a high integration degree, which is beneficial to improving the energy density of the battery 100.

[0093] Figure 4 It is a cross-sectional view of the battery 100 according to some other embodiments of the present application.

[0094] Referring to Figure 4 , in some embodiments, the first-layer battery cells 10 are connected to the thermal management component 50 through the first thermal conductive adhesive 60, and the second-layer battery cells 20 are connected to the thermal management component 50 through the second thermal conductive adhesive 70.

[0095] The thermal conductive adhesive is an adhesive, which has a connecting function and a thermal conductive function. The thermal conductive adhesive can be made of organosilicon, epoxy resin or acrylic as the main material, and high molecular materials such as fillers and thermal conductive materials are added.

[0096] The materials of the first thermal conductive adhesive 60 and the second thermal conductive adhesive 70 can be the same or different.

[0097] The first thermal conductive adhesive 60 and the second thermal conductive adhesive 70 can be selected according to design requirements. The first thermal conductive adhesive 60 and the second thermal conductive adhesive 70 can include, but are not limited to, organosilicon thermal conductive adhesive, epoxy resin AB glue, acrylic thermal conductive adhesive, polyurethane thermal conductive adhesive, etc.

[0098] In this embodiment, the first thermal conductive adhesive 60 can improve the heat exchange efficiency between the first-layer battery cells 10 and the thermal management component 50, and the second thermal conductive adhesive 70 can improve the heat exchange efficiency between the second-layer battery cells 20 and the thermal management component 50, thereby improving the thermal management effect and the reliability of the battery 100.

[0099] Figure 5 It is a schematic structural view of the thermal management component 50 according to some embodiments of the present application.

[0100] Referring to Figure 5 , and in combination with referring to Figure 2 , in some embodiments, the thermal management component 50 includes a first thermal management part 52 and a pair of second thermal management parts 51. Along the first direction Z, the first thermal management part 52 is located between the first-layer battery cells 10 and the second-layer battery cells 20. A pair of second thermal management parts 51 are arranged at intervals along the second direction Y, and the first thermal management part 52 is connected to the pair of second thermal management parts 51, and the second direction Y is perpendicular to the first direction Z.

[0101] Both the first thermal management part 52 and the second thermal management part 51 are heat exchange parts, and flow channels for accommodating heat exchange media are formed inside both the first thermal management part 52 and the second thermal management part 51. As Figure 3As shown, a first flow channel 523 is formed inside the first heat management component 52, and a second flow channel 511 is formed inside the second heat management component 51. The first flow channel 523 and the second flow channel 511 can be connected, or they can also be independent of each other.

[0102] The structures and materials of the first heat management component 52 and the second heat management component 51 can be the same or different. Optionally, in some embodiments, both the first heat management component 52 and the second heat management component 51 are configured as rectangular plates. The thickness direction of the first heat management component 52 is parallel to the first direction Z, and the thickness direction of the second heat management component 51 is perpendicular to the first direction Z.

[0103] The first heat management component 52 has opposite first surface 521 and second surface 522 along its thickness direction. In some embodiments, as Figure 5 shown, along the first direction Z, both ends of the second heat management component 51 extend beyond the first surface 521 and the second surface 522 respectively, and the first management component and a pair of second heat management components 51 are connected to form an H shape.

[0104] In this embodiment, the heat management assembly 50 includes a first heat management component 52 and a pair of second heat management components 51, and a heat management assembly 50 with higher structural strength and larger heat exchange area can be obtained.

[0105] In some embodiments, the first heat management component 52 and the second heat management component 51 are integrally formed. The integral forming process includes but is not limited to injection molding, extrusion molding, etc.

[0106] Integrally forming the first heat management component 52 and the second heat management component 51 can obtain a heat management assembly 50 with higher structural strength.

[0107] In some embodiments, the first heat management component 52 and the second heat management component 51 are welded. The welding methods include but are not limited to laser welding, friction stir welding, brazing, etc. Optionally, the first heat management component 52 and the second heat management component 51 are welded by friction stir welding.

[0108] Welding the first heat management component 52 and the second heat management component 51 can reduce the preparation difficulty of the heat management assembly 50.

[0109] Referring to Figure 5 , in some embodiments, along the first direction Z, the first heat management component 52 has opposite first surface 521 and second surface 522, and both ends of the second heat management component 51 extend beyond the first surface 521 and the second surface 522 respectively. Along the second direction Y, the first layer of battery cells 10 and the second layer of battery cells 20 are located between a pair of second heat management components 51.

[0110] Both ends of the second heat management component 51 extend beyond the first surface 521 and the second surface 522 respectively, that is, both ends of the second heat management component 51 protrude from the first surface 521 and the second surface 522 respectively. In some embodiments, the first heat management component 52 and a pair of second heat management components 51 are connected in an H shape. Along the second direction Y, the two second heat management components 51 are respectively located on both sides of the first-layer battery cells 10, the first-layer battery cells 10 are located between the pair of second heat management components 51, the two second heat management components 51 are also respectively located on both sides of the second-layer battery cells 20, and the second-layer battery cells 20 are also between the pair of second heat management components 51.

[0111] In some embodiments, the dimension by which the second heat management component 51 extends beyond the first surface 521 is equal to the dimension by which the second heat management component 51 extends beyond the second surface 522.

[0112] In other embodiments, along the first direction Z, one end of the second heat management component 51 may only extend beyond one of the first surface 521 and the second surface 522, while the other end does not extend beyond the other of the first surface 521 and the second surface 522. For example, one end of the second heat management component 51 extends beyond the first surface 521, and the other end does not extend beyond the second surface 522. A pair of second heat management components 51 and the first heat management component 52 are connected end to end in sequence to form an n-shaped structure. At this time, along the second direction Y, the two second heat management components 51 are respectively located on both sides of the first-layer battery cells 10, the first-layer battery cells 10 are located between the pair of second heat management components 51, there are no second heat management components 51 on both sides of the second-layer battery cells 20, and the second-layer battery cells 20 are not between the pair of second heat management components 51.

[0113] In this embodiment, both ends of the second heat management component 51 extend beyond the first surface 521 and the second surface 522 respectively, and the first-layer battery cells 10 are located between the pair of second heat management components 51, which can improve the heat management effect of the heat management assembly 50 on the first-layer battery cells 10. The second-layer battery cells 20 are located between the pair of second heat management components 51, which can improve the heat management effect of the heat management assembly 50 on the second-layer battery cells 20, thereby balancing the internal temperature of the battery 100 and improving the reliability of the battery 100.

[0114] Refer to Figure 4 and, in combination with reference to Figure 5 In some embodiments, the first thermal conductive adhesive 60 includes a first part 61 and a second part 62. The first-layer battery cells 10 are connected to the first heat management component 52 through the first part 61, and the first-layer battery cells 10 are connected to the second heat management component 51 through the second part 62.

[0115] Understandably, the first part 61 of the first thermal conductive adhesive 60 is disposed on the first surface 521. The first part 61 is located between the first-layer battery cell 10 and the first thermal management component 52, and the second part 62 of the first thermal conductive adhesive 60 is located between the first-layer battery cell 10 and the second thermal management component 51.

[0116] Wherein, the first part 61 and the second part 62 may be connected to each other, or the first part 61 and the second part 62 may be separated. Exemplarily, the first part 61 and the second part 62 may be connected to each other.

[0117] In this embodiment, the first part 61 is located between the first-layer battery cell 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 battery cell 10. The second part 62 is located between the first-layer battery cell 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 battery cell 10.

[0118] Refer to Figure 4 and, in combination with reference to Figure 5 In some embodiments, the second thermal conductive adhesive 70 includes a third part 71 and a fourth part 72. The second-layer battery cell 20 is connected to the first thermal management component 52 through the third part 71, and the second-layer battery cell 20 is connected to the second thermal management component 51 through the fourth part 72.

[0119] Understandably, the third part 71 of the second thermal conductive adhesive 70 is disposed on the second surface 522. The third part 71 is located between the second-layer battery cell 20 and the first thermal management component 52, and the fourth part 72 of the second thermal conductive adhesive 70 is located between the second-layer battery cell 20 and the second thermal management component 51.

[0120] Wherein, the third part 71 and the fourth part 72 may be connected to each other, or the third part 71 and the fourth part 72 may be separated. Exemplarily, the third part 71 and the fourth part 72 may be connected to each other.

[0121] In this embodiment, the third part 71 is located between the second-layer battery cell 20 and the first thermal management component 52 to improve the heat exchange efficiency between the first thermal management component 52 and the second-layer battery cell 20. The fourth part 72 is located between the second-layer battery cell 20 and the second thermal management component 51 to improve the heat exchange efficiency between the second thermal management component 51 and the second-layer battery cell 20.

[0122] In the case where both ends of the second thermal management component 51 extend beyond the first surface 521 and the second surface 522 along the first direction Z.

[0123] Refer to Figure 2 、 Figure 3 、andFigure 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 heat management component 51. Along the first direction Z, the first layer of battery cells 10 is located between the first cover 30 and the first heat management component 52. The second cover 40 is connected to the second heat management component 51. Along the first direction Z, the first cover 30 and the second cover 40 are disposed opposite to each other, the first heat 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 heat management component 52.

[0124] The structures and materials of the first cover 30 and the second cover 40 may be the same or different. The material of the heat management assembly 50 may be various, such as copper, iron, aluminum, steel, aluminum alloy, plastic, etc.

[0125] Exemplarily, both the first cover 30 and the second cover 40 are configured as one-sided open covers. It should be understood that in other embodiments, the first cover 30 and / or the second cover 40 may also be configured as a plate-like structure.

[0126] The connection between the first cover 30 and the second heat management component 51 may include, but is not limited to, flange connection, bonding, etc. A seal (not shown in the figure) may also be used to seal between the first cover 30 and the second heat management component 51.

[0127] The connection between the second cover 40 and the second heat management component 51 may include, but is not limited to, flange connection, bonding, etc. Another seal (not shown in the figure) may also be used to seal between the second cover 40 and the second heat management component 51.

[0128] In this embodiment, the first layer of battery cells 10 is located between the first cover 30 and the first heat management component 52, reducing the risk of damage to the first layer of battery cells 10 and improving the maintainability of the first layer of battery cells 10. The second layer of battery cells 20 is located between the second cover 40 and the first heat management component 52, reducing the risk of damage to the second layer of battery cells 20 and improving the maintainability of the second layer of battery cells 20.

[0129] Refer to Figure 5 and Figure 2 , in some embodiments, the first layer of battery cells 10 includes a plurality of first battery modules 11 arranged at intervals along the second direction Y, and the second direction Y is perpendicular to the first direction Z. The heat management assembly 50 includes a first heat management component 52 and a third heat management component 53. Along the first direction Z, the first heat management component 52 is located between the first layer of battery cells 10 and the second layer of battery cells 20. The third heat management component 53 is disposed on the first heat management component 52 and is located between two adjacent first battery modules 11.

[0130] Such asFigure 4 As shown, a third flow channel 531 for accommodating a heat exchange medium is formed inside the third heat management component 53.

[0131] The materials of the third heat management component 53 and the first heat management component 52 may be the same or different.

[0132] In some embodiments, the third heat management component 53 divides the first surface 521 into multiple regions to separately place the first battery module 11. At this time, the third heat management component 53 can be understood as a partition beam or a module installation beam.

[0133] The third heat management component 53 can increase the heat exchange area between the heat management assembly 50 and the first battery module 11, thereby improving the heat exchange efficiency.

[0134] In some embodiments, the first thermal conductive adhesive 60 includes a first part 61 and a fifth part 63. The first battery module 11 is connected to the first heat management component 52 through the first part 61, and the first battery module 11 is connected to the third heat management component 53 through the fifth part 63.

[0135] Understandably, the first part 61 is located between the first heat management component 52 and the first battery module 11, and the fifth part 63 is located between the first battery module 11 and the third heat management component 53.

[0136] The materials of the first part 61 and the fifth part 63 may be the same or different. The first part 61 and the fifth part 63 may be connected to each other or separately arranged.

[0137] In this embodiment, the first part 61 is located between the first battery module 11 and the first heat management component 52 to improve the heat exchange efficiency between the first heat management component 52 and the first battery module 11. The fifth part 63 is located between the first battery module 11 and the third heat management component 53 to improve the heat exchange efficiency between the third heat management component 53 and the first battery module 11.

[0138] In some embodiments, the first heat management component 52 and the third heat management component 53 are integrally formed. The integral forming process includes but is not limited to injection molding, extrusion molding, etc.

[0139] The first heat management component 52 and the third heat management component 53 being integrally formed can obtain a heat management assembly 50 with relatively high structural strength.

[0140] In some embodiments, the first heat management component 52 and the third heat management component 53 are welded. The welding methods include but are not limited to laser welding, friction stir welding, brazing, etc. Optionally, the first heat management component 52 and the third heat management component 53 are welded by friction stir welding.

[0141] The first heat management component 52 and the third heat management component 53 can reduce the manufacturing difficulty of the heat management assembly 50.

[0142] Referring to Figure 5 and in combination with reference to Figure 2 , in some embodiments, the second battery cell 20 includes a plurality of second battery modules 21 arranged at intervals along the second direction Y. The heat management assembly 50 further includes a fourth heat management component 54, and the fourth heat management component 54 is disposed on the first heat management component 52 and located between two adjacent second battery modules 21.

[0143] As Figure 4 shown, a fourth flow channel 541 for accommodating a heat exchange medium is formed inside the fourth heat management component 54.

[0144] The materials of the fourth heat management component 54 and the first heat management component 52 may be the same or different.

[0145] In some embodiments, as Figure 6 shown, the fourth heat management component 54 divides the second surface 522 into a plurality of regions for respectively placing the second battery modules 21. At this time, the fourth heat management component 54 can be understood as a partition beam or a module mounting beam.

[0146] In this embodiment, the fourth heat management component 54 can increase the heat exchange area between the heat management assembly 50 and the second battery module 21 and improve the heat exchange efficiency.

[0147] Referring to Figure 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 to the first heat management component 52 through the third portion 71, and the second battery module 21 is connected to the fourth heat management component 54 through the sixth portion 73.

[0148] Understandably, the third portion 71 is located between the first heat 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 heat management component 53.

[0149] The materials of the third portion 71 and the sixth portion 73 may be the same or different. The third portion 71 and the sixth portion 73 may be connected to each other or separately provided.

[0150] In this embodiment, the third portion 71 is located between the second battery module 21 and the first heat management component 52 to improve the heat exchange efficiency between the first heat management component 52 and the second battery module 21. The sixth portion 73 is located between the second battery module 21 and the fourth heat management component 54 to improve the heat exchange efficiency between the fourth heat management component 54 and the second battery module 21.

[0151] In some embodiments, the first heat management component 52 and the fourth heat management component 54 are integrally formed. The integral forming process can refer to that of the first heat management component 52 and the third heat management component 53, which will not be elaborated here.

[0152] Integrally forming the first heat management component 52 and the fourth heat management component 54 can obtain a heat management assembly 50 with relatively high structural strength.

[0153] In some embodiments, the first heat management component 52 and the fourth heat management component 54 are welded. The welding method can refer to that of the first heat management component 52 and the third heat management component 53, which will not be elaborated here.

[0154] Welding the first heat management component 52 and the fourth heat management component 54 can reduce the manufacturing difficulty of the heat management assembly 50.

[0155] Figure 7 FIG. is a schematic structural diagram of the heat management assembly 50 and the end wall 80 according to some embodiments of the present application.

[0156] Refer to Figure 7 、 Figure 2 and Figure 3 In some embodiments, the battery 100 further includes a pair of end walls 80. The pair of end walls 80 are arranged at intervals along the third direction X. The first heat management component 52 is located between the pair of end walls 80. Two ends of each end wall 80 are respectively connected to a pair of second heat management components 51. The third direction X, the second direction Y, and the first direction Z are perpendicular to each other in pairs.

[0157] The first cover 30, the second cover 40, the pair of end walls 80, and the pair of second heat management components 51 enclose to form a receiving cavity. The first heat 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 received in the first cavity 91, and the second layer of battery cells 20 is received in the second cavity 92.

[0158] Understandably, the pair of end walls 80, the pair of second heat management components 51, the first cover 30, and the second cover 40 enclose to form the outer structure of the battery 100. Taking the rectangular battery 100 as an example, the pair of second heat management components 51 and the pair of end walls 80 can both be configured as rectangular plates. The pair of second heat management components 51 and the pair of end walls 80 are sequentially connected end to end to form a rectangular frame with two open ends. The first cover 30 and the second cover 40 respectively cover the two openings of the rectangular frame.

[0159] In some embodiments, as shown in Figure 7 , along the first direction Z, first flanging edges 81 and second flanging edges 82 are respectively formed at two ends of the end wall 80. The first flanging edge 81 is used for connecting with the first cover 30, and the second flanging edge 82 is used for connecting with the second cover 40.

[0160] In some embodiments, the first cavity 91 is not in communication with the second cavity 92. The first cavity 91 and the second cavity 92 are two independent cavities, which can mitigate the impact of thermal runaway spread in one cavity on the other cavity. Of course, in other embodiments, the first cavity 91 and the second cavity 92 may also be in communication with each other to balance the temperature inside the battery 100.

[0161] In some embodiments, the thermal management component 50 is used to carry the second-layer battery cells 20. Carrying means that the thermal management component 50 bears the gravity of the second-layer battery cells 20, and the thermal management component 50 exerts a force to overcome the gravity on the second-layer battery cells 20. At this time, other pallets can be provided, or the end plates can be used, or the first cover 30 can be used, or the wall of other boxes can be relied on to carry the first-layer battery cells 10.

[0162] In some embodiments, the thermal management component 50 is used to carry the first-layer battery cells 10 and the second-layer battery cells 20. That is, the thermal management component 50 simultaneously provides a force to overcome the gravity for the first-layer battery cells 10 and the second-layer battery cells 20. It can be understood that the thermal management component 50 not only plays a role in thermal management but also plays a role as a support.

[0163] Referring to Figure 2 and Figure 3 , in some embodiments, the first-layer battery cells 10 include a plurality of first battery cells 101. Along the first direction Z, a first electrode terminal 1011 is provided at one end of the first battery cell 101 facing away from the second-layer battery cells 20. The second-layer battery cells 20 include a plurality of second battery cells 201. Along the first direction Z, a second electrode terminal 2011 is provided at one end of the second battery cell 201 facing away from the first-layer battery cells 10.

[0164] It can be understood that the first electrode terminal 1011 and the second electrode terminal 2011 face in opposite directions.

[0165] The first electrode terminal 1011 is a metal component for leading out the current of the first battery cell 101. Exemplarily, two first electrode terminals 1011 with opposite polarities are provided on the first battery cell 101, 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.

[0166] The second electrode terminal 2011 is a metal component for leading out the current of the second battery cell 201. Exemplarily, two second electrode terminals 2011 with opposite polarities are provided on the second battery cell 201, 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.

[0167] The first electrode terminal 1011 is disposed at one end of the first battery cell 101 facing away from the second-layer battery cell 20, and the second electrode terminal 2011 is disposed at one end of the second battery cell 201 facing away from the first-layer battery cell 10. Thus, the first electrode terminal 1011 and the second electrode terminal 2011 are at a relatively large distance, which can reduce the short-circuit risk between the first-layer battery cell 10 and the second-layer battery cell 20 and improve electrical reliability.

[0168] When the thermal management component 50 carries the first-layer battery cell 10, in some embodiments, referring to Figure 3 and Figure 4 , the first-layer battery cell 10 and the first cover 30 are arranged with a gap therebetween to form a buffer space on this side.

[0169] Figure 8 FIG. is an exploded view of the first cover 30 according to some embodiments of the present application.

[0170] Referring to Figure 8 , further, in some embodiments, the first cover 30 includes a first cover body 31 and a first inner layer plate 32 which are stacked. The first inner layer plate 32 is disposed on the side of the first cover body 31 facing the first-layer battery cell 10, and there is a gap between the first inner layer plate 32 and the first battery cell 101.

[0171] The first inner layer plate 32 can be configured as a circle, a rectangle, 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 short-circuit risk between the first-layer battery cell 10 and the first cover 30, and at the same time can also protect the inside of the box from corrosion. In order to improve the structural integrity of the box, sheet metal stamping can also be used, and an insulating layer is provided on the sheet metal surface to prepare the first inner layer plate 32.

[0172] The first cover body 31 is the peripheral structure of the first cover 30. The first cover body 31 can be configured as a one-sided open cover structure, and the first cover body can also be configured as a plate shape.

[0173] When the first cover 30 is located at the bottom of the battery 100, bottom protection needs to be considered. At this time, the first cover body 31 can adopt a crash-resistant structure and be provided with reinforcing ribs to improve the structural strength of the first cover 30.

[0174] In some embodiments, the first cover body 31 can be formed by stamping a steel plate to improve the structural strength of the first cover 30.

[0175] In some embodiments, the first cover body 31 can be made of a lightweight alloy material, such as aluminum alloy, to meet the lightweight design.

[0176] In some embodiments, the first cover body 30 includes a first cover main body 31 and a first inner layer board 32, which can improve the maintainability of the first cover body 30.

[0177] In some embodiments, the first cover body 30 further includes a first buffer layer 33, and the first buffer layer 33 is disposed between the first cover main body 31 and the first inner layer board 32.

[0178] The first buffer layer 33 is an elastic component. The first buffer layer 33 is a sandwich layer between the first cover main body 31 and the first inner layer board 32. The materials of the first buffer layer 33 include but are not limited to rubber, silica gel, polyurethane, polyethylene, foam, etc. Optionally, the first buffer layer 33 is hard rubber, and the rubber has good elasticity, durability and buffering ability.

[0179] The first buffer layer 33 can absorb or disperse external impact forces, and further reduce the risk of damage to the first layer of battery cells 10.

[0180] In some embodiments, the first buffer layer 33 is bonded to the first inner layer board 32. The bonding materials include but are not limited to double-sided tape, structural adhesive, etc.

[0181] The first buffer layer 33 is bonded to the first inner layer board 32, which improves the connection stability between the first buffer layer 33 and the first inner layer board 32, and the connection method is simple.

[0182] According to specific design requirements, the structure of the second cover body 40 can be the same as or different from that of the first cover body 30. For example, taking the battery 100 used in the vehicle 1000 as an example, if the first cover body 30 faces the bottom and needs to resist external impacts, using the above-mentioned first cover body 30 can improve the protection performance of the bottom wall of the box body, while the second cover body 40 is located at the top and the possibility of being impacted is relatively low. At this time, the second cover body 40 can be made of materials that meet the lightweight index such as plastics.

[0183] In some embodiments, the first direction Z is parallel to the direction of gravity.

[0184] The embodiment of the present application provides an electrical device, and the electrical device includes the above-mentioned battery 100, and the battery 100 is used to supply power to the electrical device.

[0185] The embodiment of the present application further provides a battery 100, and the battery 100 includes a first layer of battery cells 10, a second layer of battery cells 20, a thermal management component 50, a first cover body 30, a second cover body 40 and a pair of end walls 80.

[0186] The first layer of battery cells 10 and the second layer of battery cells 20 are stacked along the first direction Z, and the first direction Z is parallel to the direction of gravity. The first layer of battery cells 10 includes a plurality of first battery cells 101, and the plurality of first battery cells 101 are fixedly integrated into a plurality of first battery modules 11.

[0187] The second - layer battery cells 20 include a plurality of second battery cells 201, and the plurality of second battery cells 201 are fixedly integrated into a plurality of second battery modules 21.

[0188] The thermal management component 50 includes a first thermal management part 52, a pair of second thermal management parts 51, a third thermal management part 53, and a fourth thermal management part 54. The first thermal management part 52, the pair of second thermal management parts 51, the third thermal management part 53, and the fourth thermal management part 54 are integrally formed. The first thermal management part 52 is located between the first - layer battery cells 10 and the second - layer battery cells 20. The pair of second thermal management parts 51 are arranged at intervals along the second direction Y, and the first thermal management part 52 is located between the pair of second thermal management parts 51. The first thermal management part 52 has opposite first surface 521 and second surface 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, both ends of the second thermal management part 51 extend beyond the first surface 521 and the second surface 522 respectively. A first flow channel 523 for accommodating a heat - exchange medium is formed inside the first thermal management part 52, a second flow channel 511 for accommodating a heat - exchange medium is formed inside the second thermal management part 51, a third flow channel 531 for accommodating a heat - exchange medium is formed inside the third thermal management part 53, and a fourth flow channel 541 for accommodating a heat - exchange medium is formed inside the fourth thermal management part 54.

[0189] The first - layer battery cells 10 are bonded to the first surface 521 through a thermal conductive adhesive, the first - layer battery cells 10 are bonded to the second thermal management part 51 through a thermal conductive adhesive, and the first - layer battery cells 10 are bonded to the third thermal management part 53 through a thermal conductive adhesive. The second - layer battery cells 20 are bonded to the second surface 522 through a thermal conductive adhesive, the second - layer battery cells 20 are bonded to the second thermal management part 51 through a thermal conductive adhesive, and the second - layer battery cells 20 are bonded to the fourth thermal management part 54 through a thermal conductive adhesive. Along the second direction Y, both the first - layer battery cells 10 and the second - layer battery cells 20 are located between the pair of second thermal management parts 51.

[0190] The third thermal management part 53 is connected to the first thermal management part 52 and protrudes from the first surface 521. The third thermal management part 53 is located between two adjacent first battery modules 11. Each first battery module 11 is bonded to the third thermal management part 53 through a thermal conductive adhesive.

[0191] The fourth thermal management part 54 is connected to the first thermal management part 52 and protrudes from the second surface 522. The fourth thermal management part 54 is located between two adjacent second battery modules 21. Each second battery module 21 is connected to the fourth thermal management part 54 through a thermal conductive adhesive.

[0192] A pair of end walls 80 are arranged at intervals along a third direction X. The first heat management component 52 is located between the pair of end walls 80. Both ends of each end wall 80 are respectively connected to a pair of second heat management components 51. The first cover 30 is connected to the pair of second heat management components 51 and the pair of end walls 80, and the second cover 40 is connected to the pair of second heat management components 51 and the pair of second heat management components 51. The first cover 30, the second cover 40, the pair of end walls 80 and the pair of second heat management components 51 enclose to form a receiving cavity. The first heat 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 received in the first cavity 91, and the second layer of battery cells 20 is received in the second cavity 92.

[0193] The heat management assembly 50 is used to carry the first layer of battery cells 10 and the second layer of battery cells 20, and the heat management assembly 50 is further configured to adjust the temperatures of the first layer of battery cells 10 and the second layer of battery cells 20.

[0194] One end of the first battery cell 101 away from the heat management assembly 50 is provided with a first electrode terminal 1011. The first electrode terminal 1011 is located at the bottom of the first battery cell 101. One end of the second battery cell 201 away from the heat management assembly 50 is provided with a second electrode terminal 2011. The second electrode terminal 2011 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 arranged in a mirror image. 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.

[0195] 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. There is a gap 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 heat management assembly 50. The first buffer layer 33 is a rubber layer. The first cover body 31 is formed by sheet metal stamping, the first inner layer plate 32 is formed by sheet metal stamping, and the first inner layer plate 32 is welded to the first cover body 31.

[0196] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0197] 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, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A battery, characterized in that: include; A first layer of battery cells and a second layer of battery cells, wherein the first layer of battery cells and the second layer of battery cells are stacked along a first direction; a thermal management assembly, at least a portion of which is located between the first layer of battery cells and the second layer of battery cells; The first layer of battery cells and the second layer of battery cells are both thermally connected to the thermal management component, and the thermal management component is used to adjust the temperature of the first layer of battery cells and the second layer of battery cells.

2. The battery according to claim 1, characterized in that The first layer of battery cells is connected to the thermal management component via a first thermally conductive adhesive, and the second layer of battery cells is connected to the thermal management component via a second thermally conductive adhesive.

3. The battery according to claim 2, characterized in that The thermal management component 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 pair of second heat management components are arranged at intervals along a second direction, the first heat management component connects the pair of second heat management components, and the second direction is perpendicular to the first direction.

4. The battery according to claim 3, characterized in that The first heat management component and the second heat management component are integrally formed or welded.

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

6. The battery according to claim 5, characterized in that The first thermally conductive adhesive includes a first part and a second part, the first layer of battery cells is connected to the first thermal management component through the first part, and the first layer of battery cells is connected to the second thermal management component through the second part.

7. The battery according to claim 5, characterized in that The second thermally conductive adhesive includes a third part and a fourth part. The second layer of battery cells is connected to the first thermal management component through the third part, and the second layer of battery cells is connected to the second thermal management component through the fourth part.

8. The battery according to claim 5, characterized in that The battery also includes: A first cover body connected to the second thermal management component, wherein the first layer of battery cells is located between the first cover body and the first thermal management component along the first direction; The second cover is connected to the second thermal management component. Along the first direction, the first cover and the second cover are arranged opposite to each other. The first thermal management component is located between the first cover and the second cover. The second layer of battery cells is located between the second cover and the first thermal management component.

9. The battery according to claim 3, characterized in that The first layer of battery cells includes 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 further comprises: The third thermal management component is disposed on the first thermal management component and is located between two adjacent first battery modules.

10. The battery according to claim 2, characterized in that The first layer of battery cells includes 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 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; The third thermal management component is disposed on the first thermal management component and is located between two adjacent first battery modules.

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

12. The battery according to claim 9 or 10, characterized in that: The first thermal management component and the third thermal management component are integrally formed or welded.

13. The battery according to claim 9 or 10, characterized in that: The second layer of battery cells includes a plurality of second battery modules arranged at intervals along the second direction; The thermal management assembly further comprises: The fourth thermal management component is disposed on the first thermal management component and located between two adjacent second battery modules.

14. The battery according to claim 13, characterized in that The second thermally conductive adhesive includes a third part and a sixth part. The second battery module is connected to the first thermal management component through the third part, and the second battery module is connected to the fourth thermal management component through the sixth part.

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

16. The battery according to any one of claims 1 to 8, characterized in that: The first layer of battery cells includes a plurality of first battery cells, and along the first direction, the first battery cells are provided with first electrode terminals at one end thereof away from the second layer of battery cells; The second layer of battery cells includes a plurality of second battery cells. Along the first direction, a second electrode terminal is disposed at one end of the second battery cells that is away from the first layer of battery cells.

17. The battery according to any one of claims 1 to 8, characterized in that: The first direction is parallel to the direction of gravity.

18. An electrical equipment, characterized in that: The battery comprises the battery according to any one of claims 1 to 17, wherein the battery is used to supply power to the electrical device.

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