Battery and electric device

Abstract

The invention provides a battery, which comprises: a box body, in which an accommodating cavity is formed, the box body comprising a top cover; the number of the battery monomers is at least one, each battery monomer is accommodated in the accommodating cavity, and each battery monomer comprises a first side wall and a pole column; the current collecting structure is conductively connected to the pole columns in at least part of the battery monomers; wherein the top cover is fixedly connected to the first side walls of at least part of the battery monomers, and / or the top cover is fixedly connected to at least part of the current collecting structure.

Description

Technical Field

[0001] The present application relates to the field of batteries, 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 automobiles due to their advantages of energy conservation and environmental protection. For electric vehicles, battery technology is an important factor related to their development.

[0003] For battery technology, there has always been a demand for improvement in terms of enhancing battery structural strength and improving battery heat dissipation capabilities. Summary of the invention

[0004] In view of the above problems, the present application provides a battery and an electrical device, which can achieve at least one of enhancing the structural strength of the battery, improving the heat dissipation capacity of the battery, etc.

[0005] In the first aspect, the present application provides a battery, the battery comprising: a box body, a receiving cavity is formed inside, the box body comprises a top cover; a battery cell, provided as at least one, each of the battery cells is received in the receiving cavity, each of the battery cells comprises a first side wall and a pole; a current collecting structure, conductively connected to the poles in at least part of the battery cells; wherein the top cover is fixedly connected to the first side wall of at least part of the battery cells, and / or the top cover is fixedly connected to at least part of the current collecting structure. By fixedly connecting the top cover to the first side wall or the current collecting structure, the overall rigidity of the battery can be enhanced.

[0006] In some embodiments, the top cover is fixedly connected to at least part of the first side wall of the battery cell, and part of the top cover protrudes in a direction close to the battery cell to form a first protrusion, and the first protrusion is fixedly connected to the first side wall. In this way, the overall rigidity of the battery can be enhanced. In addition, the height of the top cover will not be too high.

[0007] In some embodiments, the top cover is formed by stacking and fixing a first plate and a second plate, and the first protrusion is formed by the first plate and the second plate protruding in a direction close to the battery cell, thereby enhancing the overall rigidity of the top cover and thus improving the overall rigidity of the battery.

[0008] In some embodiments, the battery cells are arranged in at least two, at least two of all the battery cells are arranged along the first direction, and the first protrusion extends along the first direction and forms a convex rib. Thus, it is convenient to form the convex rib by stamping, and the manufacturing cost is low. In addition, the convex rib can also be fixedly connected to all the battery cells along the first direction to further improve the rigidity of the battery.

[0009] In some embodiments, the battery cells are arranged in at least four rows, at least two of the battery cells arranged in the first direction together form a row of battery cells, the battery cells are arranged in at least two rows, at least two rows of battery cells in all rows are arranged in a second direction, the second direction intersects the first direction, a portion of the first protrusion is fixedly connected to the first side wall of one row of the battery cells in two adjacent rows, and another portion of the first protrusion is fixedly connected to the first side wall of the other row of the battery cells in two adjacent rows. Thus, a single protrusion can be fixedly connected to the side walls of two adjacent rows of battery cells at the same time, which can reduce the number of protrusions, reduce manufacturing costs, and improve the overall rigidity of the battery.

[0010] In some embodiments, the first protrusion is a heat-conducting structure, the first protrusion and the first side wall are fixedly connected by a first connector, and the first connector is a heat-conducting structure, thereby facilitating heat dissipation of the battery cell.

[0011] In some embodiments, the first protrusion is a conductive structure, the first protrusion and the first side wall are fixedly connected by a first connector, and the first connector is an insulating structure, thereby preventing the battery cell from leaking electricity to the top cover.

[0012] In some embodiments, the first connecting member is a heat-conducting insulating structural adhesive, thereby enabling a convenient and quick fixed connection.

[0013] In some embodiments, the top cover is fixedly connected to at least a portion of the current collecting structure, a portion of the top cover protrudes in a direction close to the battery cell to form a second protrusion, and the second protrusion is fixedly connected to the current collecting structure. Thus, the overall rigidity of the battery can be further improved.

[0014] In some embodiments, the battery cells are arranged in at least two, at least two of all the battery cells are arranged along the first direction, and the second protrusion extends along the first direction and forms a convex rib. Thus, it is convenient to form the convex rib by stamping, and the manufacturing cost is low. In addition, the convex rib can also be fixedly connected to all the battery cells along the first direction to further improve the rigidity of the battery.

[0015] In some embodiments, a flow channel is formed inside the top cover, and the flow channel is used for the flow of refrigerant, thereby improving the cooling efficiency of the battery cells.

[0016] In some embodiments, at least a portion of the flow channel is formed by the second protrusion, thereby simplifying the overall structure of the flow channel and improving the cooling efficiency of the battery cell.

[0017] In some embodiments, the second protrusion and the current collecting structure are fixedly connected via a second connecting member, and the second connecting member is a heat-conducting structure, thereby facilitating heat dissipation of the battery cell.

[0018] In some embodiments, the second protrusion is a conductive structure, the second protrusion and the current collecting structure are fixedly connected by a second connector, and the second connector is an insulating structure, thereby preventing the battery cell from leaking electricity to the top cover.

[0019] In some embodiments, the second connection member is a heat-conducting insulating structural adhesive, thereby enabling a convenient and quick fixed connection.

[0020] In some embodiments, the top cover is formed by stacking and fixing a first plate and a second plate, the first plate is arranged on a side of the second plate away from the battery cell, the second protrusion is formed by the second plate protruding in a direction close to the battery cell, and the flow channel is formed by the second protrusion and the first plate. Thus, the flow channel can be easily formed, the top cover and the flow channel have simple structures, and the manufacturing cost is low.

[0021] According to a second aspect, the present application provides an electrical device, wherein the electrical device comprises a battery according to any one of the aforementioned embodiments, and the battery is used to provide electrical energy.

[0022] 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

[0023] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0024] Figure 1 A schematic diagram of the structure of a vehicle according to some embodiments of the present application;

[0025] Figure 2 A schematic diagram of an exploded structure of a battery for a vehicle according to some embodiments of the present application;

[0026] Figure 3 is a schematic diagram of the three-dimensional structure of a battery cell in some embodiments of the present application;

[0027] Figure 4is a schematic diagram of the exploded structure of a battery cell in some embodiments of the present application;

[0028] Figure 5 A schematic diagram of a top view of a battery according to some embodiments of the present application;

[0029] Figure 6 For some embodiments of the present invention, the battery Figure 5 A cross-sectional view of line AA in FIG.

[0030] Figure 7 For some embodiments of the present invention, the battery Figure 6 An enlarged schematic diagram of part B in FIG.

[0031] The reference numerals in the specific implementation manner are as follows:

[0032] Vehicles 1000;

[0033] Battery 1, controller 2, motor 3;

[0034] Battery 1, top cover 10, current collecting structure 20, battery pack 30, box frame 40, bottom plate 50, upper plate 11, lower plate 12, top flow channel 13, bottom flow channel 51, first row of battery cells 31, second row of battery cells 32;

[0035] A first protruding portion 120, a second protruding portion 121;

[0036] Battery cell 34, shell 341, electrode assembly 342, upper cover 343, pole 344, main body 3421, pole ear 3422; DETAILED DESCRIPTION

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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).

[0043] 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.

[0044] 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.

[0045] 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.

[0046] The battery needs to have sufficient rigidity to avoid damage or breakage when in use, so it is expected that the structural rigidity is high. In addition, since the battery pack will also generate heat when in use, it is also expected that good heat dissipation can be performed when in use.

[0047] The present disclosure provides a battery, which includes: a box body with a accommodating cavity formed inside, the box body including a top cover; a battery cell, which is arranged to be at least one, each of the battery cells is accommodated in the accommodating cavity, and each of the battery cells includes a first side wall and a pole; a current collecting structure, which is conductively connected to the poles in at least part of the battery cells; wherein the top cover is fixedly connected to the first side walls of at least part of the battery cells, and / or the top cover is fixedly connected to at least part of the current collecting structure.

[0048] By fixing the top cover to the first side wall and / or the current collecting structure of the battery cell, the overall rigidity of the battery can be effectively improved. In addition, when the top cover is connected to the battery cell, a flow channel for cooling fluid can be provided in the top cover, so that the battery cell can be further cooled from above, thereby improving the cooling of the battery.

[0049] 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.

[0050] 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.

[0051] Reference Figure 1 , Figure 1A schematic diagram of the structure of a vehicle 1000 provided for some embodiments of the present application. The 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 1 is provided inside the vehicle 1000, and the battery 1 may be provided at the bottom, the head or the tail of the vehicle 1000. The battery 1 may be used to power the vehicle 1000, for example, the battery 1 may be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 2 and a motor 3, and the controller 2 is used to control the battery 1 to power the motor 3, for example, for the starting, navigation and working power requirements of the vehicle 1000 during driving.

[0052] In some embodiments of the present application, the battery 1 can be used not only as an operating power source for the vehicle 1000, but also 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.

[0053] Reference Figure 2 , Figure 2 Schematic diagram of the exploded structure of a battery for a vehicle according to some embodiments of the present application is shown. Figure 2 As shown, the battery 1 of this embodiment includes, in order from top to bottom, a top cover 10 , a current collecting structure 20 , a battery pack 30 , a box frame 40 , and a bottom plate 50 .

[0054] When the top cover 10 and the box frame 40 are covered together, they are used to provide a storage space for the battery pack 30. The top cover 10 covers the open side of the box frame 40 so that the top cover 10 and the box frame 40 jointly define a storage space. In the present embodiment, the box frame 40 is a hollow structure with an opening on the upper side, and the top cover 10 covers the open side of the box frame 40. In the present embodiment, the box body formed by the top cover 10 and the box frame 40 is generally rectangular. Of course, the box body formed by the top cover 10 and the box frame 40 can be in a variety of shapes, such as a cylinder, etc. The material of the top cover 10 and the box frame 40 can be a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the present application embodiment does not impose any special restrictions on this.

[0055] The battery pack 30 includes one or more battery cells. There can be multiple battery cells, which can be connected in series, in parallel, or in a hybrid connection. A hybrid connection means that multiple battery cells are connected in series and in parallel. Multiple battery cells can be directly connected in series, in parallel, or in a hybrid connection, and then the whole formed by the multiple battery cells is accommodated in the bottom frame 40; of course, the battery pack 30 can also be a plurality of battery cells that are first connected in series, in parallel, or in a hybrid connection to form a block, and then the multiple blocks are connected in series, in parallel, or in a hybrid connection to form a whole, and then accommodated in the bottom frame 40.

[0056] Each battery cell 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 may be flat, rectangular, or in other shapes.

[0057] The battery 1 may further include a current collecting structure 20 for achieving electrical connection between a plurality of battery cells. The current collecting structure 20 is formed in a generally plate shape and is connected to the pole 344 of the battery cell. In this embodiment, the current collecting structure is welded to the pole 344.

[0058] The bottom plate 50 is arranged below the bottom frame 40. A cooling channel is provided inside the bottom plate 50. Since the battery cells generate heat during the charging and discharging process, the cooling medium is passed into the cooling channel, and the cooling medium absorbs the heat, thereby cooling the battery cells.

[0059] Reference Figure 3 and Figure 4 , Figure 3 is a schematic diagram of the three-dimensional structure of a battery cell in some embodiments of the present application, Figure 4 The figure is a schematic diagram of the exploded structure of a battery cell according to some embodiments of the present application. The battery cell 34 includes a housing 341, an electrode assembly 342, an upper cover 343, a pole 344 and other functional components.

[0060] The shell 341 is a component that forms the internal environment of the battery cell 34, wherein the formed internal environment can be used to accommodate the electrode assembly 342, the electrolyte and other components. The shell 341 can be of various shapes and sizes, such as a rectangular parallelepiped, a cylindrical shape, a hexagonal prism shape, etc. Specifically, the shape of the shell 341 can be determined according to the specific shape and size of the electrode assembly 342. The material of the shell 341 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiment of the present application does not impose any special restrictions on this.

[0061] The electrode assembly 342 is a component in the battery cell 34 where electrochemical reactions occur. One or more electrode assemblies 342 may be included in the housing 341. The electrode assembly 342 is mainly formed by winding or stacking the positive electrode sheet and the negative electrode sheet, and a separator is usually provided between the positive electrode sheet and the negative electrode sheet. The parts of the positive electrode sheet and the negative electrode sheet with active materials constitute the main body 3421 of the electrode assembly, and the parts of the positive electrode sheet and the negative electrode sheet without active materials each constitute a pole ear 3422. In order to improve the current capacity, the pole ear 3422 includes a plurality of pole ear sheets arranged in a stacked manner. During the charge and discharge process of the battery, the positive electrode active material and the negative electrode active material react with the electrolyte, and the pole ear 3422 is electrically connected to the pole 344 to form a current loop.

[0062] The upper cover 343 refers to a component that covers the opening of the shell 341 to isolate the internal environment of the battery cell 34 from the external environment. Without limitation, the shape of the upper cover 343 can be adapted to the shape of the shell 341 to match the shell 341. Optionally, the upper cover 343 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the upper cover 343 is not easy to deform when it is squeezed and collided, so that the battery cell 34 can have a higher structural strength and the safety performance can also be improved. A pole 344 can be set on the upper cover 343. The pole 344 is used to be electrically connected to the electrode assembly 342 for outputting or inputting the electrical energy of the battery cell 34. In some embodiments, the upper cover 343 can also be provided with a pressure relief mechanism for releasing the internal pressure when the internal pressure or temperature of the battery cell 34 reaches a threshold. The material of the upper cover 343 can also be a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiment of the present application does not impose any special restrictions on this. In some embodiments, an insulating member may be provided inside the upper cover 343 to isolate the electrical connection components in the housing 341 from the upper cover 343 to reduce the risk of short circuit. For example, the insulating member may be plastic, rubber, or the like.

[0063] The shell 341 and the upper cover 343 can be independent components. Without limitation, the shell 341 and the upper cover 343 can also be integrated. Specifically, the shell 341 and the upper cover 343 can form a common connection surface before other components are put into the shell. When the interior of the shell 341 needs to be encapsulated, the upper cover 343 covers the shell 341.

[0064] exist Figure 3 and Figure 4 In the illustrated embodiment, the housing 341 has one opening, and the corresponding battery cell only needs one upper cover 343 to close the one opening. In other embodiments not shown in the drawings, the housing 341 may also have two openings arranged opposite to each other, and the corresponding battery cell needs two upper covers 343 to respectively close the two openings.

[0065] According to some embodiments of the present application, referring to Figure 2 , Figure 5 , and please refer to Figure 6 and Figure 7 , Figure 5 Schematic diagram of the top view of the battery structure of some embodiments of the present application, Figure 6 For some embodiments of the present invention, the battery Figure 5 The cross-sectional view of line AA in Figure 7 For some embodiments of the present invention, the battery Figure 6The present application provides a battery 1, a box body, a receiving cavity is formed inside, the box body includes a top cover 10; a battery cell, which is provided as at least one, each of the battery cells 34 is received in the receiving cavity, each of the battery cells 34 includes a first side wall and a pole 344; a current collecting structure 20, which is conductively connected to the poles 344 in at least part of the battery cells 34; wherein the top cover 10 is fixedly connected to the first side wall of at least part of the battery cells 34, and / or the top cover 10 is fixedly connected to at least part of the current collecting structure 20.

[0066] For battery cells, such as Figure 6 As shown, the battery cells 33 and 34 are described as examples, referring to Figure 3 and Figure 4 , the structure of the battery cell is described by taking the battery cell 34 as an example. It should be understood that the battery cell in the present application is not limited to the battery cell shown by the reference numerals, but can be any one or more of the one or more battery cells included in the battery pack.

[0067] The “first side wall” refers to the wall of the battery cell except the bottom wall, including the four side walls of the housing 341 and the upper cover 343. In the following description, the top cover 10 is fixedly connected to the upper cover 343 as an example, but the present application is not limited thereto, and the top cover 10 may also be fixedly connected to the four side walls of the housing 341. In addition, the top cover 10 may also be connected to any one or more of the upper cover 343 and the four side walls of the housing 341 at the same time.

[0068] “Fixed connection” means that the two parts cannot move relative to each other after being connected, but are integrated.

[0069] The fixed connection may include, for example, bonding, etc. The connection may include direct connection or indirect connection, for example, the top cover 10 may be directly connected to the battery cell 34, or an intermediate component may be provided between the top cover 10 and the battery cell 34 to connect the two.

[0070] By connecting the top cover 10 with the upper cover 343 and / or the current collecting structure 20 of the battery cell, the top cover 10 and the battery cell form a whole. Compared with the top cover 10 and the battery cell being separated after the top cover 10 is covered on the box frame 40, forming a whole can increase the overall rigidity of the top cover 10 and the battery cell. In addition, since the battery pack 30 is placed in the box frame 40, the top cover 10, the battery pack 30 and the box frame 40 also form a whole, which increases the rigidity of the entire battery.

[0071] According to some embodiments of the present application, optionally, continue to refer to Figures 5 to 7The top cover 10 is fixedly connected to the upper cover 343 (or the first side wall) of at least a portion of the battery cell 34, and a portion of the top cover 10 protrudes in a direction close to the battery cell 34 to form a first protrusion 120, and the first protrusion 120 is fixedly connected to the upper cover 343 (or the first side wall).

[0072] like Figure 7 As shown, the direction close to the battery cell 34 is along Figure 2 The Z direction in the figure is downward. When the battery is normally placed, the height of the upper cover 343 is lower than the height of the current collecting component 20. Therefore, by forming the first protrusion 120 to be fixedly connected to the upper cover 343, the height dimension of the entire battery can be reduced. At the same time, the protrusion can be formed by stamping, and the manufacturing cost is low.

[0073] According to some embodiments of the present application, optionally, continue to refer to Figure 2 , Figures 5 to 7 The top cover 10 is formed by stacking and fixing an upper plate 11 (or a first plate body) and a lower plate 12 (or a second plate body), and the first protrusion 120 is formed by the upper plate 11 and the lower plate 12 protruding in a direction close to the battery cell 34.

[0074] like Figure 2 As shown, the top cover 10 is formed by two plates, and the two plates are stacked and fixed to further improve the overall rigidity of the battery. In addition, the two plates are protruded together in the direction close to the battery cell 34, which means that the two plates can be formed here by the same stamping process, reducing the manufacturing cost and improving the overall rigidity.

[0075] According to some embodiments of the present application, optionally, continue to refer to Figure 2 , Figures 5 to 7 The number of the battery cells is at least two, at least two of the battery cells are arranged along a first direction, and the first protrusion 120 extends along the first direction and forms a convex rib.

[0076] The first direction is Figure 2 The Y direction is perpendicular to Figure 6 and Figure 7 The direction of the paper.

[0077] like Figure 5 As shown, the first protrusion 120 extends along the first direction and forms a rib, that is, the first protrusion 120 extends along the longitudinal direction of the battery or the Y direction. Therefore, the first protrusion 120 can be selectively fixedly connected to one or more battery cells in the first direction.

[0078] According to some embodiments of the present application, optionally, continue to refer to Figure 2 , Figures 5 to 7 , the battery cells are arranged to be at least four, at least two of the battery cells arranged along the first direction together form a row of battery cells, the battery cells have at least two rows 31, 32, at least two rows of battery cells in all rows of the battery cells are arranged along a second direction, the second direction intersects with the first direction, a portion of the first protrusion 120 is fixedly connected to the upper cover (or first side wall) of one row of the battery cells in two adjacent rows, and another portion of the first protrusion 120 is fixedly connected to the upper cover (or first side wall) of the other row of the battery cells in two adjacent rows.

[0079] The second direction is Figure 2 The X direction in the Figure 6 and Figure 7 The second direction is perpendicular to the first direction.

[0080] Figure 6 and Figure 7 In the figure, reference numerals 31 and 32 represent two adjacent rows of battery cells, and reference numerals 33 and 34 represent a single battery cell in each row of battery cells. In this embodiment, the battery pack 30 includes six rows of battery cells. It should be understood that the present application is not limited thereto, and the battery pack 30 may include more or fewer rows of battery cells. The number of battery cells in each row of battery cells may also be two or more.

[0081] like Figure 7 As shown, the first protrusion 120 is disposed above the upper covers 343 of the battery cells 33 and 34 in two adjacent rows of battery cells 31 and 32. The left side of the first protrusion 120 is fixedly connected to the upper cover of the battery cell 33. The right side of the first protrusion 120 is fixedly connected to the upper cover of the battery cell 34.

[0082] That is, by arranging the first protrusion 120 to be connected to the upper covers 343 of the battery cells in the two rows of battery cells at the interface between the two adjacent rows of battery cells, the portion where the top cover 10 or the first protrusion 120 is connected to the upper covers 343 of the battery cells can be increased, thereby improving the overall rigidity of the battery 1. In addition, the number of the first protrusions 120 can be reduced, thereby reducing the processing cost of the lower plate 12.

[0083] According to some embodiments of the present application, optionally, continue to refer to Figures 5 to 7 The first protrusion 120 is a heat-conducting structure. The first protrusion 120 and the upper cover 343 (or the first side wall) are fixedly connected by a first connecting member (not shown). The first connecting member is a heat-conducting structure.

[0084] The first connector is not shown in the figure. The first connector is arranged between the first protrusion 120 and the upper cover 343 along the Z direction. By setting the first protrusion 120 to be heat-conductive and using the first connector, which is also a heat-conductive structure, to fix the first protrusion 120 and the upper cover 343, the heat dissipation of the battery can be enhanced. The first protrusion 120 can be a heat-conductive metal, such as aluminum (thermal conductivity is about 217.7W / m · K), aluminum alloy (thermal conductivity is about 121-151W / m · K), stainless steel (thermal conductivity is about 10-30W / m · K) etc.

[0085] According to some embodiments of the present application, optionally, continue to refer to Figures 5 to 7 The first protrusion 120 is a conductive structure, the first protrusion 120 and the upper cover 343 (or the first side wall) are fixedly connected by a first connecting member (not shown), and the first connecting member is an insulating structure.

[0086] As mentioned above, when the first protrusion 120 is made of metal, the first protrusion 120 is also a conductive structure. Therefore, by setting the first connector as an insulating structure, it is possible to prevent the battery cell from leaking electricity to the top cover.

[0087] According to some embodiments of the present application, optionally, the first connector is a heat-conducting insulating structural adhesive. The thermal conductivity of the heat-conducting insulating structural adhesive may be 0.3-6 W / m·K. The heat-conducting insulating structural adhesive not only has heat-conducting and insulating functions, but also has a certain structural strength.

[0088] According to some embodiments of the present application, optionally, continue to refer to Figure 2 , Figures 5 to 7 The top cover 10 is fixedly connected to at least a portion of the current collecting structure 20 , and a portion of the top cover 10 protrudes in a direction close to the battery cell 34 to form a second protrusion 121 , and the second protrusion 121 is fixedly connected to the current collecting structure 20 .

[0089] As mentioned above, the direction close to the battery cell 34 is along Figure 2 In the downward direction of the middle Z direction, the second protrusion 121 is fixedly connected to the current collecting structure 20, so as to further improve the overall rigidity of the battery.

[0090] In addition, the first protrusion 120 and the second protrusion 121 are arranged at different positions. Figure 5 As shown, in this embodiment, the first protrusion 120 and the second protrusion 121 both extend along the longitudinal direction of the top cover 10 (i.e., the left-right direction in the figure), and multiple first protrusions 120 and second protrusions 121 are arranged along the lateral direction of the top cover 10. Figure 5 In the embodiment, the first protrusion 120 and the second protrusion 121 extend in parallel along the longitudinal direction. Figure 6 and Figure 7 In this embodiment, the battery cell includes two poles 344, so the current collecting structure 20 is connected to the poles 344 at two locations, and the second protrusion 121 for one battery cell can be connected to the current collecting structure 20 at the two locations. It should be understood that the second protrusion 121 can also be connected to the current collecting structure 20 at one location or at other locations other than where the current collecting structure 20 is connected to the pole 344.

[0091] According to some embodiments of the present application, optionally, continue to refer to Figure 2 , Figures 5 to 7 The number of the battery cells is at least two, at least two of the battery cells are arranged along a first direction, and the second protrusions 121 extend along the first direction and form ribs.

[0092] like Figure 5 As shown, the second protrusion 121 extends along the first direction and forms a rib, that is, the second protrusion 121 extends along the longitudinal direction or y direction of the battery. Therefore, the second protrusion 121 can be selectively fixedly connected to one or more battery cells in the first direction.

[0093] According to some embodiments of the present application, optionally, continue to refer to Figures 5 to 7 A flow channel 13 is formed inside the top cover 10, and the flow channel is used for the flow of a refrigerant. Thus, the battery cell can be cooled from the top, thereby improving the cooling efficiency of the battery. The refrigerant can be, for example, cooling water.

[0094] According to some embodiments of the present application, optionally, continue to refer to Figures 5 to 7 , at least part of the flow channel 13 is formed by the second protrusion 121. Thus, the flow channel 13 can be formed simply and effectively without adding additional structures, and the manufacturing cost is also low.

[0095] According to some embodiments of the present application, optionally, continue to refer to Figures 5 to 7 The second protrusion 121 and the current collecting structure 20 are fixedly connected via a second connecting member (not shown), and the second connecting member is a heat-conducting structure.

[0096] The second connector is not shown in the figure. The second connector is arranged between the second protrusion 121 and the current collecting structure 20 along the Z direction. By setting the second protrusion 121 to be heat-conductive and fixing the second protrusion 121 and the current collecting structure 20 with the first connector which is also a heat-conductive structure, the heat dissipation of the battery can be enhanced. The second protrusion 121 can be a heat-conductive metal, such as aluminum (the thermal conductivity is about 217.7W / m · K), aluminum alloy (thermal conductivity is about 121-151W / m · K), stainless steel (thermal conductivity is about 10-30W / m · K) etc.

[0097] According to some embodiments of the present application, optionally, continue to refer to Figures 5 to 7 The second protrusion 121 is a conductive structure. The second protrusion 121 and the current collecting structure 20 are fixedly connected by a second connecting member (not shown). The second connecting member is an insulating structure.

[0098] As mentioned above, when the second protrusion 121 is made of metal, the second protrusion 121 is also a conductive structure. Therefore, by setting the second connector as an insulating structure, it is possible to prevent the battery cell from leaking electricity to the top cover.

[0099] According to some embodiments of the present application, optionally, the second connector is a heat-conducting insulating structural adhesive. The thermal conductivity of the heat-conducting insulating structural adhesive may be 0.3-6 W / m·K. The heat-conducting insulating structural adhesive not only has heat-conducting and insulating functions, but also has a certain structural strength.

[0100] According to some embodiments of the present application, optionally, continue to refer to Figures 5 to 7 The top cover 10 is formed by stacking and fixing an upper plate 11 (or a first plate body) and a lower plate 12 (or a second plate body), wherein the upper plate 11 is arranged on a side of the lower plate 12 away from the battery cell, and the second protrusion 121 is formed by the lower plate 12 protruding in a direction close to the battery cell 34, and the flow channel 13 is formed by the second protrusion 121 and the upper plate 11.

[0101] "A side away from the battery cell" means along Figure 2 The Z direction in the figure is upward. The top cover 10 is formed by the upper plate 11 and the lower plate 12, so that a flow channel can be formed therebetween to cool the battery cell from the top. Since the flow channel 13 is formed by the second protrusion 121 and the upper plate 11, the structure of the top cover 10 itself can be used to form the flow channel, and the manufacturing cost is low and effective.

[0102] According to some embodiments of the present application, an electrical device is further provided, wherein the electrical device comprises a battery according to any one of the aforementioned embodiments, and the battery is used to provide electrical energy.

[0103] 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, comprising: A box body, the interior of which forms a receiving cavity, and the box body includes a top cover; A battery cell, provided as at least one, each of the battery cells is accommodated in the accommodation cavity, and each of the battery cells comprises a first side wall and a pole; A current collecting structure, conductively connected to the poles in at least part of the battery cells; The top cover is fixedly connected to at least a portion of the first side wall of the battery cell, and / or the top cover is fixedly connected to at least a portion of the current collecting structure.

2. The battery according to claim 1, characterized in that The top cover is fixedly connected to at least a portion of the first side wall of the battery cell, a portion of the top cover protrudes in a direction close to the battery cell to form a first protrusion, and the first protrusion is fixedly connected to the first side wall.

3. The battery according to claim 2, characterized in that The top cover is formed by stacking and fixing a first plate and a second plate, and the first protrusion is formed by the first plate and the second plate protruding together in a direction close to the battery cell.

4. The battery according to claim 2 or 3, characterized in that: The battery cells are provided in at least two numbers, at least two of all the battery cells are arranged along a first direction, and the first protrusions extend along the first direction and form convex ribs.

5. The battery according to claim 4, characterized in that The number of the battery cells is at least four, at least two of the battery cells arranged along the first direction together form a row of battery cells, there are at least two rows of battery cells, at least two rows of battery cells in all rows of the battery cells are arranged along a second direction, the second direction intersects with the first direction, a portion of the first protrusion is fixedly connected to the first side wall of one row of the battery cells in two adjacent rows, and another portion of the first protrusion is fixedly connected to the first side wall of the other row of the battery cells in two adjacent rows.

6. The battery according to claim 2, characterized in that The first protrusion is a heat-conducting structure, the first protrusion and the first side wall are fixedly connected via a first connecting member, and the first connecting member is a heat-conducting structure.

7. The battery according to claim 2, characterized in that The first protrusion is a conductive structure, the first protrusion and the first side wall are fixedly connected via a first connecting member, and the first connecting member is an insulating structure.

8. The battery according to claim 6 or 7, characterized in that: The first connecting member is a thermally conductive insulating structural adhesive.

9. The battery according to claim 1, characterized in that The top cover is fixedly connected to at least a portion of the current collecting structure, a portion of the top cover protrudes in a direction close to the battery cell to form a second protrusion, and the second protrusion is fixedly connected to the current collecting structure.

10. The battery according to claim 9, characterized in that The battery cells are provided in at least two numbers, at least two of all the battery cells are arranged along a first direction, and the second protrusions extend along the first direction and form ribs.

11. The battery according to claim 9, characterized in that A flow channel is formed inside the top cover, and the flow channel is used for the flow of refrigerant.

12. The battery according to claim 11, characterized in that At least a portion of the flow channel is formed by the second protrusion.

13. The battery according to claim 11 or 12, characterized in that: The second protrusion and the current collecting structure are fixedly connected via a second connecting member, and the second connecting member is a heat-conducting structure.

14. The battery according to any one of claims 9 to 13, characterized in that: The second protrusion is a conductive structure, the second protrusion and the current collecting structure are fixedly connected via a second connecting member, and the second connecting member is an insulating structure.

15. The battery according to claim 13 or 14, characterized in that: The second connecting member is a thermally conductive insulating structural adhesive.

16. The battery according to claim 11 or 12, characterized in that: The top cover is formed by stacking and fixing a first plate body and a second plate body, the first plate body is arranged on a side of the second plate body away from the battery cell, the second protrusion is formed by the second plate body protruding in a direction close to the battery cell, and the flow channel is formed by the second protrusion and the first plate body.

17. An electrical device, wherein: The electrical device comprises a battery according to any one of claims 1 to 16, and the battery is used to provide electrical energy.

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