Battery and electric device

Abstract

The utility model provides a battery and an electric device, and belongs to the field of batteries. The embodiment of the utility model provides a battery, which comprises a plurality of battery monomer groups arranged along a first direction, any battery monomer group comprises a plurality of battery monomers arranged along a second direction, and the second direction intersects with the first direction; and at least one isolation part, wherein any isolation part is located between two adjacent battery monomer groups and extends along the second direction.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery and an electrical device. Background Art

[0002] Energy conservation and emission reduction are the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their advantages in energy conservation and environmental protection. For electric vehicles, battery technology is an important factor in their development.

[0003] The development of battery technology must consider many design factors at the same time, such as energy density, cycle life, discharge capacity, charge and discharge rate, safety, etc. Among them, how to reasonably arrange the structure of the battery under the condition of a certain internal space of the battery is of great significance to improve the utilization rate of the internal space of the battery and improve the overall performance of the battery. Utility Model Content

[0004] The present application aims to solve at least one of the technical problems in the background technology. To this end, one object of the present application is to provide a battery and an electrical device to improve the overall performance of the battery.

[0005] An embodiment of the first aspect of the present application provides a battery, comprising: a plurality of battery cell groups arranged along a first direction, any battery cell group comprising a plurality of battery cells arranged along a second direction, the second direction intersecting with the first direction; and at least one isolation portion, any isolation portion being located between two adjacent battery cell groups and extending along the second direction.

[0006] In the technical solution of the embodiment of the present application, an isolation part is provided between two adjacent battery cell groups to isolate and position the battery cell groups, thereby replacing the role of the cross beams and longitudinal beams in the box body, thereby simplifying the structure in the box body, reducing unnecessary weight, optimizing the space utilization inside the battery, and improving the energy density of the battery.

[0007] In some embodiments, the isolation portion includes an isolation frame defining at least one hollow area, and the projection of any battery cell in the battery cell group adjacent to the isolation frame toward the surface of the isolation frame along the first direction at least partially falls into the hollow area. By setting the isolation portion as an isolation frame with a hollow area, the weight of the isolation portion itself can be reduced, which is conducive to improving the energy density of the battery, and can provide space for the expansion and deformation of adjacent battery cells, thereby alleviating the extrusion between battery cells caused by expansion, thereby causing adverse effects on the battery cells.

[0008] In some embodiments, the isolation portion further includes a heat insulating pad supported by the isolation frame, the heat insulating pad being configured to block heat transfer between two battery cell groups adjacent to the isolation portion; and / or the isolation portion further includes a buffer pad supported by the isolation frame, the buffer pad being configured to buffer expansion deformation of the battery cell adjacent to the isolation portion. Providing a heat insulating pad and / or buffer pad can block heat transfer between two adjacent battery cell groups or alleviate deformation and extrusion, thereby improving the reliability of battery operation to a certain extent and reducing the risk of thermal runaway or lithium deposition damage.

[0009] In some embodiments, the isolation portion includes a heat insulating pad, which is configured to block heat transfer between two battery cell groups adjacent to the isolation portion. By providing a heat insulating pad, the heat transfer between the two battery cell groups can be blocked while achieving physical separation of adjacent battery cell groups, thereby effectively suppressing the spread of thermal runaway and improving the reliability of the battery.

[0010] In some embodiments, the isolation portion includes a buffer pad, which is configured to buffer the expansion and deformation of the battery cell adjacent to the isolation portion. By providing the buffer pad, the physical separation of adjacent battery cell groups can be achieved, and the mutual compression of adjacent battery cells during expansion and deformation can be alleviated, thereby effectively alleviating the risk of lithium deposition and damage to the battery and improving the reliability of the battery.

[0011] In some embodiments, the ratio of the projection area S1 of the isolation portion along the first direction to the projection area S2 of the adjacent battery cell group along the first direction satisfies: 0.6≤S1 / S2≤1.1. Setting the ratio S1 / S2 between 0.6 and 1.1 can well balance the separation, heat insulation and / or buffering effects and the energy density of the battery.

[0012] In some embodiments, the projection of the isolation portion along the first direction completely falls within the projection range of the adjacent battery cell group along the first direction, and the ratio of the projection area S1 of the isolation portion along the first direction to the projection area S2 of the adjacent battery cell group along the first direction satisfies: 0.8≤S1 / S2≤1. The ratio S1 / S2 is limited to between 0.8 and 1, so that the isolation portion can achieve physical separation while also helping to improve the energy density of the battery.

[0013] In some embodiments, along the second direction, the ratio of the size L1 of the isolating portion to the size L2 of the adjacent battery cell group satisfies 0.8≤L1 / L2≤1, and / or along the third direction perpendicular to the first direction and the second direction, the ratio H2 of the size H1 of the isolating portion to the size of the adjacent battery cell group satisfies: 0.6≤H1 / H2≤1.3. Limiting the ratio of the length and / or the ratio of the height of the isolating portion to the adjacent battery cell group within a suitable range can help achieve a reasonable arrangement of the isolating portion to improve the space utilization of the battery, thereby improving the energy density, while meeting the separation requirements.

[0014] In some embodiments, the battery further includes at least one thermal management component, which extends along the second direction and is attached to the surface of the battery cell group facing the first direction, so as to perform heat exchange with adjacent battery cell groups; at least one battery cell group is provided between any thermal management component and any isolation portion. By providing a thermal management component and arranging it between adjacent battery cell groups, it can achieve heat exchange while separating adjacent battery cell groups, especially when used in combination with isolation portions of different structural forms, so that multiple battery cell groups of the battery can be separated by isolation portions or thermal management components, while taking into account multiple functions such as heat exchange, heat insulation, buffering, etc., to improve the overall performance of the battery.

[0015] An embodiment of the second aspect of the present application provides an electrical device, which includes the battery in the above embodiment, and the battery is used to provide electrical energy.

[0016] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the multiple drawings represent the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings only depict some embodiments disclosed in the present application and should not be regarded as limiting the scope of the present application.

[0018] Figure 1 A schematic diagram of the structure of a vehicle according to some embodiments of the present application;

[0019] Figure 2 A schematic diagram of the exploded structure of a battery according to some embodiments of the present application;

[0020] Figure 3 A schematic diagram of the exploded structure of a battery cell according to some embodiments of the present application;

[0021] Figure 4 A schematic diagram of the exploded structure of a battery provided in some embodiments of the present application;

[0022] Figure 5 A schematic diagram of the structure of an isolation part provided in some embodiments of the present application;

[0023] Figure 6 Some embodiments of the present application provide Figure 5 Sectional view in the AA direction;

[0024] Figure 7 For other embodiments of the present application Figure 5 Sectional view in the AA direction;

[0025] Figure 8 Some embodiments of the present application provide Figure 5 Sectional view in the AA direction;

[0026] Fig. 9 Schematic diagram of partial structural decomposition of batteries provided in some embodiments of the present application.

[0027] Description of reference numerals:

[0028] Vehicles 1000;

[0029] Battery 100, controller 200, motor 300;

[0030] Box body 10, first part 11, second part 12;

[0031] Battery cell 20, end cover 21, electrode terminal 21a, housing 22, battery cell assembly 23, and tab 23a;

[0032] Battery cell group 110 , isolation portion 120 , isolation frame 121 , hollow area 122 , thermal insulation pad 123 , buffer pad 124 , first buffer pad 1241 , second buffer pad 1242 , thermal management component 130 , first direction X, second direction Y, third direction Z. DETAILED DESCRIPTION

[0033] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0035] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0036] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0037] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0038] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0039] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0040] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should 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 mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0041] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0042] In order to meet different power requirements, the battery may include multiple battery cells, wherein the multiple battery cells may be connected in series, in parallel, or in a hybrid connection, wherein the hybrid connection refers to a mixture of series and parallel connections. Optionally, multiple battery cells may be connected in series, in parallel, or in a hybrid connection to form a battery module, and multiple battery modules may be connected in series, in parallel, or in a hybrid connection to form a battery. In other words, multiple battery cells may be directly formed into a battery, or may be first formed into a battery module, and the battery module may then be formed into a battery. The battery is further disposed in an electrical device to provide electrical energy to the electrical device.

[0043] In the related art, the interior of the battery case is mostly arranged in the form of through-section beams, tubes, and tubular beams. Multiple horizontal beams and longitudinal beams divide the interior of the battery into multiple installation areas for battery modules. Multiple battery cells are grouped into multiple battery modules and then arranged in the battery case. Such a grouping scheme will result in the battery cells in the battery case being arranged less compactly, and the various beam structures will also occupy more weight, thereby affecting the energy density of the battery.

[0044] In order to improve the energy density of the battery, some embodiments of the present application propose a battery, which improves the grouping form of the battery cells. The battery includes multiple battery cell groups arranged along a first direction and at least one isolation unit group; any battery cell group includes multiple battery cells arranged along a second direction, and the second direction intersects with the first direction; any isolation unit group includes multiple isolation units arranged in sequence along the second direction, and the multiple isolation units are located between two adjacent battery cell groups to separate the two adjacent battery cell groups. The separation is achieved by arranging the battery cells into multiple battery cell groups and sandwiching isolation unit groups between adjacent battery cell groups. In this way, the battery cells can be directly arranged in a compact group with multiple battery cell groups along the first direction without being divided into multiple battery modules. In this way, the corresponding positioning components such as cross beams and longitudinal beams set in the battery can be eliminated, thereby improving the energy density of the battery.

[0045] The battery disclosed in the embodiment of the present application can be used in, but not limited to, electrical devices such as vehicles, ships or aircraft. The battery disclosed in the present application can be used to form a power supply system of the electrical device, which is conducive to improving the utilization rate of the internal space of the battery and improving the overall performance of the battery.

[0046] The embodiment of the present application provides an electric device using a battery as a power source, and the electric device may be, but is not limited to, a mobile phone, a tablet, a laptop, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc. Among them, the electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc., and the spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0047] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device according to an embodiment of the present application.

[0048] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of a vehicle provided for some embodiments of the present application. Vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 100 is provided inside the vehicle 1000, and the battery 100 may be provided at the bottom, head or tail of the vehicle 1000. The battery 100 may be used to power the vehicle 1000, for example, the battery 100 may be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery 100 to power the motor 300, for example, for starting, navigating and driving the vehicle 1000.

[0049] In some embodiments of the present application, the battery 100 can not only serve as an operating power source for the vehicle 1000, but also serve as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0050] Please refer to Figure 2 , Figure 2 Schematic diagram of the exploded structure of the battery provided for some embodiments of the present application. The battery 100 includes a box 10 and a battery cell 20, and the battery cell 20 is contained in the box 10. Among them, the box 10 is used to provide a storage space for the battery cell 20, and the box 10 can adopt a variety of structures. In some embodiments, the box 10 may include a first part 11 and a second part 12, the first part 11 and the second part 12 cover each other, and the first part 11 and the second part 12 jointly define a storage space for accommodating the battery cell 20. The second part 12 can be a hollow structure with one end open, the first part 11 can be a plate-like structure, and the first part 11 covers the open side of the second part 12, so that the first part 11 and the second part 12 jointly define a storage space; the first part 11 and the second part 12 can also be hollow structures with one side open, and the open side of the first part 11 covers the open side of the second part 12. Of course, the box 10 formed by the first part 11 and the second part 12 can be in a variety of shapes, such as a cylinder, a cuboid, etc.

[0051] In the battery 100, there may be multiple battery cells 20, and the multiple battery cells 20 may be connected in series, in parallel, or in a mixed connection. A mixed connection means that the multiple battery cells 20 are both connected in series and in parallel. The multiple battery cells 20 may be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the multiple battery cells 20 is accommodated in the box 10; of course, the battery 100 may also be a battery module formed by connecting multiple battery cells 20 in series, in parallel, or in a mixed connection, and then the multiple battery modules are connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in the box 10. The battery 100 may also include other structures, for example, the battery 100 may also include a busbar component for realizing electrical connection between the multiple battery cells 20.

[0052] Each battery cell 20 may be a secondary battery or a primary battery, or a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 20 may be cylindrical, flat, rectangular, or in other shapes.

[0053] Please refer to Figure 3 , Figure 3 The schematic diagram of the decomposition structure of a battery cell provided in some embodiments of the present application. A battery cell 20 refers to the smallest unit that constitutes a battery. Figure 3 The battery cell 20 includes an end cover 21, a shell 22, a battery cell assembly 23 and other functional components.

[0054] The end cap 21 refers to a component that covers the opening of the shell 22 to isolate the internal environment of the battery cell 20 from the external environment. Without limitation, the shape of the end cap 21 can be adapted to the shape of the shell 22 to match the shell 22. Optionally, the end cap 21 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the end cap 21 is not easily deformed when squeezed and collided, so that the battery cell 20 can have a higher structural strength and the safety performance can also be improved. Functional components such as electrode terminals 21a can be provided on the end cap 21. The electrode terminal 21a can be used to electrically connect to the battery cell assembly 23 for outputting or inputting electrical energy of the battery cell 20. In some embodiments, the end cap 21 can also be provided with a pressure relief mechanism for releasing the internal pressure when the internal pressure or temperature of the battery cell 20 reaches a threshold. The material of the end cap 21 can also be a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. In some embodiments, an insulating member may be provided inside the end cap 21, and the insulating member may be used to isolate the electrical connection components in the housing 22 from the end cap 21 to reduce the risk of short circuit. For example, the insulating member may be plastic, rubber, or the like.

[0055] The shell 22 is a component used to cooperate with the end cap 21 to form the internal environment of the battery cell 20, wherein the formed internal environment can be used to accommodate the battery cell assembly 23, electrolyte and other components. The shell 22 and the end cap 21 can be independent components, and an opening can be set on the shell 22, and the internal environment of the battery cell 20 is formed by covering the opening with the end cap 21 at the opening. Without limitation, the end cap 21 and the shell 22 can also be integrated. Specifically, the end cap 21 and the shell 22 can form a common connection surface before other components are put into the shell, and when the interior of the shell 22 needs to be encapsulated, the end cap 21 covers the shell 22. The shell 22 can be of various shapes and sizes, such as a rectangular parallelepiped, a cylindrical shape, a hexagonal prism, etc. Specifically, the shape of the shell 22 can be determined according to the specific shape and size of the battery cell assembly 23. The material of the shell 22 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0056] The battery cell assembly 23 is a component in the battery cell 20 where electrochemical reactions occur. One or more battery cell assemblies 23 may be contained in the housing 22. The battery cell assembly 23 is mainly formed by winding or stacking positive and negative electrode sheets, and a separator is usually provided between the positive and negative electrode sheets. The parts of the positive and negative electrode sheets with active materials constitute the main body of the battery cell assembly, and the parts of the positive and negative electrode sheets without active materials each constitute a tab 23a. The positive tab and the negative tab may be located together at one end of the main body or respectively at both ends of the main body. During the charge and discharge process of the battery, the positive active material and the negative active material react with the electrolyte, and the tab 23a connects the electrode terminals to form a current loop.

[0057] Please refer to Figure 4 , Figure 4 Schematic diagram of the exploded structure of a battery provided for some embodiments of the present application.

[0058] The embodiment of the present application provides a battery 100 , which includes a plurality of battery cell groups 110 and at least one isolation portion 120 .

[0059] The plurality of battery cell groups 110 are arranged along a first direction X. Each battery cell group 110 includes a plurality of battery cells 20 arranged along a second direction Y. The second direction Y intersects the first direction X.

[0060] Any isolation portion 120 is located between two adjacent battery cell groups 110 and extends along the second direction Y.

[0061] The multiple battery cells 20 in the battery 100 are first formed into multiple battery cell groups 110, each battery cell group 110 includes multiple battery cells 20 arranged along the second direction Y, and then the multiple battery cell groups 110 are arranged into groups along the first direction. In some examples, the multiple battery cells 20 are square shell battery cells of the same specification, and the battery cells 20 include two opposite large faces and a connection face connecting the two large faces. In any battery cell group 110, the multiple battery cells 20 are arranged in a manner that the large faces are parallel to the second direction Y. In some examples, the first direction X can be perpendicular to the second direction Y.

[0062] The number of the isolating portion 120 may be one or more. It is understandable that only one isolating portion 120 is provided between any two adjacent battery cell groups 110. The isolating portion 120 may be in contact with the surface of the adjacent battery cell group 110 facing the second direction Y, or a certain gap may be allowed. The isolating portion 120 may be any shape extending along the second direction Y, such as a rectangle. The isolating portion 120 may be a flat solid component, a semi-solid component with a hollowed-out center area along the second direction Y, or even a frame structure with a completely hollowed-out center area. The thickness of the isolating portion 120 may be determined according to the actual layout requirements, and the material of the isolating portion 120 may be made of a material with a lower density, which can further reduce its own weight.

[0063] By providing an isolation portion 120 between two adjacent battery cell groups, the battery cell group 110 can be isolated and positioned, thereby replacing the role of the cross beam and longitudinal beam in the box body, thereby simplifying the structure in the box body, reducing unnecessary weight, optimizing the space utilization inside the battery, and improving the energy density of the battery.

[0064] See also Figure 5 and Figure 6 , Figure 5 A schematic diagram of the structure of an isolation part provided in some embodiments of the present application; Figure 6 Some embodiments of the present application provide Figure 5 Cross-sectional view along the AA direction.

[0065] According to some embodiments of the present application, the isolation portion 120 includes an isolation frame 121 that defines at least one hollow area 122, and the projection of a surface of any battery cell 20 in the battery cell group 110 adjacent to the isolation frame 121 toward the isolation frame 122 along the first direction at least partially falls into the hollow area 122.

[0066] The isolation part 120 includes an isolation frame 121. The isolation frame 121 can be of any shape, for example, having a rectangular outer contour. The central area of ​​the isolation frame 121 is provided with at least one hollow area 122. The shape of the hollow area 122 can be any shape, for example, rectangular.

[0067] In some examples, the isolation frame 121 includes a plurality of hollow regions 122 , and the plurality of hollow regions 122 are sequentially arranged along the second direction Y.

[0068] In another example, the number of hollow areas 122 can be equal to the number of battery cells 20 in the battery cell group 110, and the hollow areas 122 are arranged one by one with the battery cells 20. Furthermore, the shape of the hollow areas 122 can be adapted to the surface of the battery cell 20 facing the isolation portion 120. For example, the surface of the battery cell 20 facing the isolation portion 120 is a rectangular surface with the largest surface area, and the shape of the hollow areas 122 is also a rectangle. The projection of the surface of any battery cell 20 in the battery cell group 110 adjacent to the isolation frame 121 facing the isolation frame 122 along the first direction at least partially falls into the hollow area, so that when the battery cell 20 expands during operation, such as Figure 6 As shown, the surface profile K facing the isolation frame 122 may protrude into the hollow area 122 . In other words, the hollow area 122 may provide a certain deformable space for the battery cells 20 of the adjacent battery cell group 110 to allow the battery cells 20 to deform to a certain extent.

[0069] By setting the isolation part 122 as an isolation frame 121 with a hollow area 122, the weight of the isolation part 122 itself can be reduced, which is beneficial to improving the energy density of the battery, and can provide space for the expansion and deformation of adjacent battery cells 20, thereby alleviating the extrusion between battery cells caused by expansion, and further causing adverse effects on the battery cells 20.

[0070] See also Figure 7 and Figure 8 , Figure 7 For other embodiments of the present application Figure 5 Sectional view in the AA direction; Figure 8 Some embodiments of the present application provide Figure 5 Cross-sectional view along the AA direction.

[0071] According to some embodiments of the present application, the isolation portion 120 further includes a heat insulation pad 123 supported by the isolation frame 121 , and the heat insulation pad 123 is configured to block heat transfer between two battery cell groups 110 adjacent to the isolation portion 120 .

[0072] In some embodiments, the isolation part 120 further includes a buffer pad 124 supported by the isolation frame 121 , and the buffer pad 124 is configured to buffer expansion deformation of the battery cell 20 adjacent to the isolation part 120 .

[0073] The thermal insulation pad 123 can be connected to the isolation frame 121 and arranged in the hollow area of ​​the isolation frame 121, for example, the thermal insulation pad 123 can partially or completely fill the hollow area 122. The thermal insulation pad 123 can be connected to the isolation frame 121 in a fixed or detachable manner so that the isolation frame 121 can support the thermal insulation pad. In some examples, the inner surface of the isolation frame 121 forming the hollow area 122 is formed with a mounting groove, and the thermal insulation pad 123 can be clamped in the mounting groove.

[0074] The arrangement of the buffer pad 124 may be the same as that of the thermal insulation pad 123 , which will not be described in detail here.

[0075] The material of the thermal insulation pad 123 can be a thermal insulation material with a low thermal conductivity to block the heat transfer between two adjacent battery cell groups 110, such as aerogel, polyurethane, etc.

[0076] The material of the buffer pad 124 can be an elastic material, such as rubber, polyurethane, etc. It is understandable that the heat insulation pad 123 and the buffer pad 124 can be made of an elastic material with a low thermal conductivity, so that the functions of heat insulation and buffering can be achieved at the same time.

[0077] In some embodiments, the isolation portion 120 also includes a heat insulation pad 123 and a buffer pad 124 supported by the isolation frame 121. The buffer pad 124 is located on one or more surfaces of the heat insulation pad 123 facing the battery cell group 110, such as Figure 8 As shown, the buffer pad 124 includes a first buffer pad 1241 and a second buffer pad 1242, and the thermal insulation pad 123 is sandwiched between the first buffer pad 1241 and the second buffer pad 1242 to form a composite material layer of a sandwich structure, and is supported together by the isolation frame 121. The battery cell group 110 adjacent to the isolation portion 120 can be fitted with the surface of the buffer pad, or a certain gap can be retained. Optionally, the width of the isolation frame along the first direction X is greater than the thickness of the thermal insulation pad 123 or the buffer pad 124 or the composite pad formed by the combination of the thermal insulation pad 123 and the buffer pad 124, so that when the battery cell does not expand, a certain gap can be retained with the thermal insulation pad 123 or the buffer pad 124 to allow a certain expansion deformation.

[0078] By arranging the thermal insulation pad 123 and / or the buffer pad 124 on the isolation frame 121, the heat transfer between two adjacent battery cell groups 110 is blocked or the deformation and extrusion are relieved, thereby improving the reliability of the battery operation to a certain extent and reducing the risk of thermal runaway or lithium deposition damage.

[0079] According to some embodiments of the present application, the isolation portion 120 includes a heat insulation pad 123 , and the heat insulation pad 123 is configured to block heat transfer between two battery cell groups 110 adjacent to the isolation portion 120 .

[0080] The isolation portion 120 may be composed of a separate heat insulating pad 123 . The heat insulating pad 123 may directly contact the surface of the battery cell 20 or may be separated by a certain gap.

[0081] By providing the heat insulating pad 123 , the adjacent battery cell groups 110 can be physically separated and the heat transfer between the two can be blocked, thereby effectively suppressing the spread of thermal runaway and improving the reliability of the battery.

[0082] According to some embodiments of the present application, the isolation portion 120 includes a buffer pad 124 configured to buffer expansion deformation of the battery cell 20 adjacent to the isolation portion 120 .

[0083] The isolation portion 120 may be composed of a separate buffer pad 124 . The buffer pad 124 may directly contact the surface of the battery cell 20 or may be separated by a certain gap.

[0084] By providing the buffer pad 124 , the physical separation of adjacent battery cell groups 110 can be achieved, and the mutual squeezing of adjacent battery cells 20 during expansion and deformation can be alleviated, thereby effectively alleviating the risk of lithium deposition and damage of the battery and improving the reliability of the battery 100 .

[0085] See also Fig. 9 , Fig. 9 Schematic diagram of partial structural decomposition of batteries provided in some embodiments of the present application.

[0086] According to some embodiments of the present application, a ratio of a projection area S1 of the isolation portion 120 along the first direction X to a projection area S2 of an adjacent battery cell group 110 along the first direction X satisfies: 0.6≤S1 / S2≤1.1.

[0087] The extending direction of the isolation portion 120 is the same as the arrangement direction of the battery cells 20 in the battery cell group 110. In some examples, the first direction X is perpendicular to the second direction Y. At this time, the projection area S1 of the isolation portion 120 along the first direction X is actually the projection area of ​​the isolation portion 120 on the plane where the surface of the battery cell group 110 facing the isolation portion 120 is located. The ratio of the projection area S2 of the battery cell group 110 along the first direction X can reflect the area size of the isolation portion 120 and the adjacent battery cell group 110.

[0088] The smaller the ratio S1 / S2 is, the smaller the area of ​​the separator 120 relative to the battery cell group 110 in the first direction X is, so the separation effect and even the heat insulation and / or buffering effect are less obvious; the larger the ratio S1 / S2 is, the more unnecessary space loss will be caused on the basis of satisfying the separation effect and even the heat insulation and / or buffering effect, which is not conducive to the improvement of battery energy density. Therefore, setting the ratio S1 / S2 of the projection area of ​​the two along the first direction between 0.6 and 1.1 can well balance the separation, heat insulation and / or buffering effect and the energy density of the battery.

[0089] According to some embodiments of the present application, the projection of the isolation portion 120 along the first direction X completely falls within the projection range of the adjacent battery cell group 110 along the first direction X, and the ratio of the projection area S1 of the isolation portion 120 along the first direction X to the projection area S2 of the adjacent battery cell group 110 along the first direction X satisfies: 0.8≤S1 / S2≤1.

[0090] In some examples, the projection of the isolating portion 120 along the first direction X completely falls within the projection range of the adjacent battery cell group 110 along the first direction X, so that the length of the isolating portion 120 along the second direction Y and the height of the isolating portion 120 along the third direction Z will not exceed the size of the battery cell group 110 along the second direction Y and the third direction Z, respectively, so that no additional internal battery space is occupied. For example, the length of the isolating portion 120 along the second direction Y is the same as the length of the battery cell group 110 along the second direction, and the ratio of the height of the isolating portion 120 along the third direction Z to the height of the battery cell group 110 along the third direction Z is between 0.8 and 1, so that the separation effect can be well achieved, and at the same time, the isolating portion will not exceed the size range of the battery cell group 110, which can maximize the space utilization.

[0091] The projection area ratio of the isolation part 120 to the adjacent battery cell group 110 along the first direction X is limited to between 0.8 and 1, so that the isolation part 120 can achieve physical separation, heat insulation and buffering while being more conducive to the arrangement of the isolation part 120, which is conducive to improving the energy density of the battery.

[0092] According to some embodiments of the present application, along the second direction Y, a ratio of a size L1 of the isolation portion 120 to a size L2 of an adjacent battery cell group 110 satisfies 0.8≤L1 / L2≤1.

[0093] According to some embodiments of the present application, along a third direction Z perpendicular to the first direction X and the second direction Y, a ratio of a size H1 of the isolation portion 120 to a size H2 of the adjacent battery cell group 110 satisfies: 0.6≤H1 / H2≤1.3

[0094] like Fig. 9As shown, the shape of the isolating portion 120 is the same or similar rectangle as the battery cell group 110, the dimension L1 of the isolating portion 120 along the second direction Y is the length of the isolating portion 120, and the dimension L2 of the battery cell group 110 is the length of the battery cell group 110. Optionally, the ratio of L1 / L2 satisfies 0.9≤L1 / L2≤1, so that a better separation effect can be obtained.

[0095] Similarly, the dimension H1 of the separator 120 along the third direction Z is the height of the separator 120, and the dimension H2 of the battery cell group 110 is the height of the battery cell group. Optionally, the ratio of H1 / H2 satisfies 0.85≤H1 / H2≤1.05, which can achieve better separation effect and improve battery energy density.

[0096] Limiting the length ratio and / or height ratio of the isolation portion 120 to the adjacent battery cell group 110 within a suitable range can facilitate reasonable arrangement of the isolation portion 120 to improve battery space utilization and thereby improve energy density while meeting separation requirements.

[0097] According to some embodiments of the present application, the battery 100 also includes at least one thermal management component 130, which extends along the second direction X and is attached to the surface of the battery cell group 110 facing the first direction X, so as to be used for heat exchange with adjacent battery cell groups 110; at least one battery cell group 110 is provided between any thermal management component 130 and any isolation portion 120.

[0098] The thermal management component 130 may be a component for thermal management of the battery cells, such as a water cooling plate. A flow channel is provided inside the thermal management component 130, and the flow channel may be connected to the outside through a pipeline to realize the circulation of the cooling medium and thus achieve heat exchange with the battery cells.

[0099] There may be one or more thermal management components 130 . In some examples, the thermal management component 130 may be spaced apart from the isolation portion 120 along the first direction X between two adjacent battery cell groups 110 , and at least one battery cell group 110 is disposed between any thermal management component 130 and any isolation portion 120 .

[0100] By providing a thermal management component 130 and arranging it between adjacent battery cell groups 110, it is possible to achieve heat exchange while separating adjacent battery cell groups 110. In particular, when used in combination with an isolation portion, multiple battery cell groups 110 of a battery 100 can be separated by an isolation portion 120 or a thermal management component 130, and multiple functions such as heat exchange, thermal insulation, and buffering can be taken into account, thereby improving the overall performance of the battery.

[0101] An embodiment of the present application provides an electrical device, which includes the battery 100 as described above, and the battery 100 is used to provide electrical energy.

[0102] The battery 100 of the present application is further described in detail below in conjunction with a specific embodiment.

[0103] like Figure 4-Figure 9 As shown, an embodiment of the present application provides a battery 100 , which includes a plurality of battery cell groups 110 , at least one isolation portion 120 , and at least one thermal management component 130 .

[0104] The plurality of battery cell groups 110 are arranged along a first direction X. Each battery cell group 110 includes a plurality of battery cells 20 arranged along a second direction Y. The second direction Y is perpendicular to the first direction X.

[0105] Any isolating portion 120 is located between two adjacent battery cell groups 110 and extends along the second direction Y, and the thermal management component 130 extends along the second direction X and is attached to the surface of the battery cell group 110 facing the first direction X. In one example, the isolating portion 120 and the thermal management component 130 are alternately arranged between two adjacent battery cell groups 110 along the first direction X, and at least one battery cell group 110 is arranged between any thermal management component 130 and any isolating portion 120.

[0106] In one example, the isolation portion 120 includes an isolation frame 121 defining at least one hollow area 122 , and a projection of a surface of any battery cell 20 in the battery cell group 110 adjacent to the isolation frame 121 toward the isolation frame 122 along the first direction at least partially falls into the hollow area 122 .

[0107] In one example, the isolation portion 120 includes an isolation frame 121 defining at least one hollow area 122 , and a thermal insulation pad 123 supported by the isolation frame 121 , the thermal insulation pad 123 being configured to block heat transfer between two battery cell groups 110 adjacent to the isolation portion 120 .

[0108] In one example, the isolation portion 120 includes an isolation frame 121 defining at least one hollow area 122 , and a buffer pad 124 supported by the isolation frame 121 , the buffer pad 124 being configured to buffer expansion deformation of the battery cell 20 adjacent to the isolation portion 120 .

[0109] In one example, the isolation portion 120 includes a heat insulation pad 123 configured to block heat transfer between two battery cell groups 110 adjacent to the isolation portion 120 .

[0110] In one example, the separator 120 includes a buffer 124 configured to buffer expansion deformation of the battery cell 20 adjacent to the separator 120 .

[0111] In some embodiments, isolation parts 120 and thermal management components 130 are alternately arranged between multiple battery cell groups 110 within the battery 100, wherein the isolation part 120 may simultaneously include one or more of a plurality of structural forms including an isolation frame 121, a thermal insulation pad 123, a buffer pad 124, an isolation frame 121 combined with a thermal insulation pad 123, an isolation frame 121 combined with a buffer pad 124, and an isolation frame 121 combined with a thermal insulation pad 123 and a buffer pad 124.

[0112] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery, characterized in that: include: A plurality of battery cell groups arranged along a first direction, any of the battery cell groups comprising a plurality of battery cells arranged along a second direction, the second direction intersecting the first direction; as well as at least one isolating portion, any of the isolating portions being located between two adjacent battery cell groups and extending along the second direction; The isolation portion includes an isolation frame defining at least one hollow area, and a projection of a surface of any battery cell in the battery cell group adjacent to the isolation frame toward the isolation frame along the first direction at least partially falls into the hollow area.

2. The battery according to claim 1, characterized in that The isolation part further includes a heat insulation pad supported by the isolation frame, and the heat insulation pad is configured to block heat transfer between two battery cell groups adjacent to the isolation part.

3. The battery according to claim 1, characterized in that The spacer includes a buffer pad supported by the spacer frame, the buffer pad being configured to buffer expansion deformation of a battery cell adjacent to the spacer.

4. The battery according to claim 1, characterized in that The isolation portion includes a heat insulation pad and a buffer pad supported by the isolation frame, wherein the heat insulation pad is configured to block heat transfer between two battery cell groups adjacent to the isolation portion, and the buffer pad is configured to buffer expansion deformation of a battery cell adjacent to the isolation portion.

5. The battery according to any one of claims 1 to 4, characterized in that A ratio S2 of a projection area S1 of the partition along the first direction to a projection area of ​​an adjacent battery cell group along the first direction satisfies: 0.6≤S1 / S2≤1.

1.

6. The battery according to claim 5, characterized in that The projection of the isolation portion along the first direction completely falls within the projection range of the adjacent battery cell group along the first direction, and a ratio S2 of the projection area S1 of the isolation portion along the first direction to the projection area of ​​the adjacent battery cell group along the first direction satisfies: 0.8≤S1 / S2≤1.

7. The battery according to any one of claims 1 to 4, characterized in that Along the second direction, a ratio of a size L1 of the isolation portion to a size L2 of the adjacent battery cell group satisfies 0.8≤L1 / L2≤1, and / or along a third direction perpendicular to the first direction and the second direction, a ratio H2 of a size H1 of the isolation portion to a size of the adjacent battery cell group satisfies: 0.6≤H1 / H2≤1.

3.

8. The battery according to any one of claims 1 to 4, characterized in that Also includes: at least one heat management component, the heat management component extending along the second direction and in contact with the surface of the battery cell group facing the first direction, so as to perform heat exchange with the adjacent battery cell group; At least one battery cell group is arranged between any of the thermal management components and any of the isolation parts.

9. An electrical device, characterized in that: The electrical device comprises a battery as claimed in any one of claims 1 to 8, wherein the battery is used to provide electrical energy.

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