Battery module, battery and electric equipment

Abstract

The embodiment of the utility model provides a battery module, a battery, electric equipment and a manufacturing method of the battery module, and relates to the technical field of batteries. Wherein the battery module comprises foam and battery cells, a plurality of battery cell holes are formed in the foam, the battery cell holes penetrate through the foam, and anti-skid coatings are arranged on the side walls of the battery cell holes; and the battery cells are arranged in the battery cell holes in a one-to-one correspondence manner and are in contact with the anti-skid coatings. According to the battery module disclosed by the invention, foam is adopted to replace polystyrene foam, and the foam has a relatively good flame-retardant effect, so that the transmission and spreading speed of heat among a plurality of battery cells can be reduced, the probability of thermal runaway of the battery module is reduced, and the use safety of the battery module is improved. And the anti-skid coating can play an anti-skid role to prevent the battery cell from rotating in the battery cell hole or moving in the depth direction of the battery cell hole, so that the battery cell is fixed, the structural stability of the battery module is relatively high, and the electrical property is more stable.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of batteries, and in particular to a battery module, a battery and an electrical device. Background Art

[0002] Nowadays, with the increasing application of batteries, in some fields, the requirements for battery energy density and lightweight are becoming higher and higher.

[0003] A battery generally includes multiple battery modules, each battery module generally includes multiple battery cells, and the multiple battery cells are fixed with foam glue. The flame retardant effect of foam glue is poor, which makes the battery prone to thermal runaway, seriously affecting the safety of battery use. Utility Model Content

[0004] In view of the above problems, the embodiments of the present application provide a battery module, a battery and an electrical device, which improve the safety of the existing battery module.

[0005] According to a first aspect of an embodiment of the present application, a battery module is provided, which includes foam and battery cells. A plurality of battery cell holes are provided on the foam, and the battery cell holes penetrate the foam. The side walls of the battery cell holes are provided with an anti-slip coating. The battery cells are installed one by one in the battery cell holes and in contact with the anti-slip coating.

[0006] By adopting the above scheme, foam is used instead of foam glue. Foam has a good flame retardant effect, can reduce the speed of heat transfer and spread between multiple battery cells, reduce the probability of thermal runaway of the battery module, and improve the safety of battery module. In addition, the foam glue is light in weight, which is conducive to the lightweight design of the battery module. An anti-slip coating is provided on the side wall of the battery cell cavity. When the battery cell is installed in the battery cell cavity, the anti-slip coating can play an anti-slip role, preventing the battery cell from rotating in the battery cell cavity or moving along the depth direction of the battery cell cavity, thereby fixing the battery cell, so that the structural stability of the battery module is higher and the electrical performance is more stable.

[0007] In some embodiments, the depth of the battery cell cavity is smaller than the height of the battery cell, the upper end surface of the battery cell is higher than the upper end surface of the battery cell cavity, and the lower end surface of the battery cell is lower than the lower end surface of the battery cell cavity; the upper end surface of the battery cell is the end surface of the battery cell where the pole is provided, and the upper end surface of the battery cell cavity is the end surface of the battery cell cavity close to the upper end surface of the battery cell.

[0008] By adopting the above solution, the two end faces and part of the side faces of the battery cell are not wrapped by the foam, so that the heat of the battery cell can be released from the unwrapped part. In addition, the upper end face of the battery cell is higher than the upper end face of the battery cell hole, and the lower end face of the battery cell is lower than the lower end face of the battery cell hole. This can prevent the presence of the foam from interfering with the connection process when connecting other components at both ends of the battery cell, thereby facilitating the assembly of the battery module.

[0009] In some embodiments, the distance between the lower end surface of the battery cell cavity and the lower end surface of the battery cell is smaller than the distance between the upper end surface of the battery cell cavity and the upper end surface of the battery cell.

[0010] By adopting the above solution, the center of gravity of the battery module is close to the lower part, and the battery module is relatively stable in the box and is not prone to tipping over.

[0011] In some embodiments, the depth h of the battery cell cavity and the height H of the battery cell satisfy 75%H≤h≤95%H.

[0012] By adopting the above scheme, the above relationship between the depth h of the battery cell hole and the height H of the battery cell can prevent the shallow depth of the battery cell hole from causing the foam to be loosely fixed to the battery cell, and can also prevent the distance between the end face of the battery cell and the end face of the corresponding side of the battery cell hole from being too small, resulting in limited connection between the battery cell and other components of the battery module.

[0013] In some embodiments, the anti-slip coating has a thickness of 1 mm to 3 mm.

[0014] By adopting the above solution, if the thickness of the anti-slip coating is less than 1 mm, the anti-slip effect will be greatly reduced, and if the thickness of the anti-slip coating is greater than 3 mm, the space occupied by the anti-slip coating is too large. Therefore, when the thickness of the anti-slip coating is within the above range, the anti-slip effect of the anti-slip coating is guaranteed while saving space.

[0015] In some embodiments, the battery module further includes a cold plate, and the lower end surface of the battery cell is in contact with the cold plate.

[0016] By adopting the above solution, the cold plate can directly contact the battery cell and take away the heat of the battery cell, which is conducive to the rapid dissipation of the heat of the battery cell.

[0017] In some embodiments, a thermal conductive coating is provided on the outer shell of the battery cell, and / or a thermal conductive coating is provided on the side wall of the battery cell cavity, and / or a thermal conductive coating is provided on the anti-slip coating.

[0018] By adopting the above scheme, the thermal conductive coatings arranged at the above three positions can all contact the side walls of the battery cell, thereby quickly conducting the heat of the battery cell, allowing the battery cell to be cooled quickly, and preventing high temperature from affecting the electrical performance of the battery cell.

[0019] According to a second aspect of the embodiments of the present application, a battery is provided, comprising a battery module according to any of the above embodiments.

[0020] According to a third aspect of the embodiments of the present application, there is provided an electrical device, comprising the battery in the above embodiments.

[0021] According to a fourth aspect of an embodiment of the present application, a method for manufacturing a battery module is provided, comprising:

[0022] A foam is provided, and a plurality of battery cell holes are processed on the foam, wherein the battery cell holes penetrate the foam.

[0023] An anti-skid material is provided and arranged on the side wall of the battery cell cavity to form an anti-skid coating.

[0024] Provide battery cells, install the battery cells in the battery cell holes one by one, and make the battery cells contact with the anti-slip coating.

[0025] By adopting the above scheme, the position of the battery cell hole on the foam is the installation position of the battery cell, and the foam can fix multiple battery cells, and the fixing method is simpler. Anti-skid material is set on the side wall of the battery cell hole to form an anti-skid coating. When the battery cell is installed in the battery cell hole, the anti-skid coating can play an anti-skid role, preventing the battery cell from rotating in the battery cell hole or moving along the depth direction of the battery cell hole, thereby fixing the battery cell, making the structural stability of the battery module higher and the electrical performance more stable. The foam is used to fix the battery cell. The foam has a good flame retardant effect, can reduce the speed of heat transfer and spread between multiple battery cells, reduce the probability of thermal runaway of the battery module, and improve the safety of the battery module.

[0026] In some embodiments, the size of the battery cell cavity provided with the anti-slip coating in any direction perpendicular to the depth direction is smaller than the size of the battery cell in the corresponding direction.

[0027] By adopting the above solution, after the battery cell is installed in the battery cell cavity, a transition fit or interference fit is formed between the battery cell cavity and the battery cell, so that the battery cell is not easy to rotate or displace in the battery cell cavity.

[0028] The present application uses foam to fix the battery cells. The foam has a good flame retardant effect, can reduce the speed of heat transfer and spread between multiple battery cells, reduce the probability of thermal runaway of the battery module, and improve the safety of the battery module. By providing an anti-skid coating on the side wall of the battery cell cavity, when the battery cell is installed in the battery cell cavity, the anti-skid coating can play an anti-skid role, preventing the battery cell from rotating in the battery cell cavity or moving along the depth direction of the battery cell cavity, thereby fixing the battery cell, making the structural stability of the battery module higher and the electrical performance more stable.

[0029] The above description is only an overview of the technical solution of the embodiment of the present application. In order to more clearly understand the technical means of the embodiment 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 embodiment 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

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 This is a schematic diagram of the structure of a battery module in an embodiment of the present application.

[0032] Figure 2 This is a schematic diagram of the structure of the foam in the embodiment of the present application.

[0033] Figure 3 It is a top view of a part of the foam in the embodiment of the present application.

[0034] Figure 4 This is a flow chart of a method for manufacturing a battery module in an embodiment of the present application.

[0035] Explanation of reference numerals: 100, foam; 110, battery cell hole; 200, battery cell; 300, anti-slip coating; 400, thermal conductive coating; 500, cold plate. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0037] 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 in the specification of the application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0038] The terms "comprising" and "having" and any variations thereof in the specification, claims and drawings of this application are intended to cover but not exclude other contents. The word "a" or "an" does not exclude the presence of a plurality.

[0039] 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 "embodiments" 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.

[0040] The term "and / or" in this article is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can mean: 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.

[0041] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of the battery module, battery or electrical equipment of the present application. For example, in the description of the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present application.

[0042] In addition, the expressions of the indicated directions, such as the X direction, the Y direction, and the Z direction, used to illustrate the operation and construction of the components of the battery module, the battery, or the electrical equipment of the present embodiment are not absolute but relative, and although these indications are appropriate when the components of the battery module, the battery, or the electrical equipment are in the positions shown in the figures, when these positions change, these directions should be interpreted differently to correspond to the changes.

[0043] In addition, the terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects rather than to describe a specific order, and may explicitly or implicitly include one or more of the features.

[0044] In the description of the present application, unless otherwise specified, "plurality" means more than two (including two), and similarly, "multiple groups" means more than two groups (including two).

[0045] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, the "connection" or "connection" of a mechanical structure may refer to a physical connection. For example, the physical connection may be a fixed connection, such as a fixed connection through a fixing member, such as a fixed connection through a screw, bolt or other fixing member; the physical connection may also be a detachable connection, such as a mutual snap connection or snap connection; the physical connection may also be an integral connection, such as welding, bonding or integral molding to form a connection for connection. The "connection" or "connection" of a circuit structure may refer to an electrical connection or a signal connection in addition to a physical connection. For example, it may be a direct connection, that is, a physical connection, or it may be an indirect connection through at least one intermediate element, as long as the circuit is connected, or it may be the internal connection of two elements; the signal connection may refer to a signal connection through a media medium, such as a radio wave, in addition to a signal connection through a circuit. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0046] The present invention discloses a manufacturing method of a battery module, a battery, an electric device and a battery module, wherein the electric device comprises the battery or the battery module, and can be provided with electric energy by the battery or the battery module. The electric device may be a vehicle, a mobile phone, a portable device, a laptop computer, a ship, a spacecraft, an electric toy, an electric tool, an energy storage device, an amusement equipment, an elevator and a lifting device, etc. The vehicle 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. The spacecraft may include an airplane, a rocket, a space shuttle and a spacecraft, etc. The electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy or an electric airplane toy, etc. The electric tool may include a metal cutting electric tool, a grinding electric tool, an assembly electric tool and an electric tool for railways, such as an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact drill, a concrete vibrator and an electric planer, etc. The energy storage device may be an energy storage wall, a base station energy storage, a container energy storage, etc. The amusement equipment may be a carousel, a jumping machine, etc. This application does not impose any special restrictions on the above-mentioned electrical equipment.

[0047] For new energy vehicles, the above batteries can be used as a driving power source, thereby replacing fossil fuels to provide driving power.

[0048] The battery may include the battery module. Each battery module includes a plurality of cells, which may be connected in series and / or in parallel and form a battery module with a module management system. The plurality of battery modules may be electrically connected in series, in parallel or in a combination of series and parallel and form a battery with a battery management system.

[0049] The battery cell may be a lithium ion battery, a sodium ion battery or a magnesium ion battery, and its outer contour may be cylindrical, flat, rectangular or other shapes, but is not limited thereto. Specifically in this embodiment, the battery cell is a cylindrical battery.

[0050] When multiple battery cells form a battery module, the multiple battery cells need to be fixed so that the positions of the multiple battery cells are relatively determined, and a busbar component is used to connect the multiple battery cells in series or in parallel, wherein the busbar component can be a metal bar.

[0051] In the related art, a method for fixing multiple battery cells is to use foam glue to fill between the multiple battery cells. However, in actual applications, the battery module using foam glue often has some problems. One is the problem of tearing of the battery sheet, and the other is the problem of thermal runaway.

[0052] After research, the inventors found that the reason for the tearing of the tabs is that the foam glue does not firmly fix the battery cells, causing the battery cells to shake or rotate easily, thereby causing the distance between multiple battery cells to change, thus causing the tabs to tear. The reason for the thermal runaway of the battery is that the heat generated by the battery cells during operation cannot be dissipated in time, resulting in thermal rise. When the temperature rises to a certain level, the battery cells will catch fire, and the foam glue does not have a flame retardant effect. Therefore, the fire is easy to spread to other battery cells, causing thermal runaway and heat spread.

[0053] In view of the above problems, embodiments of the present application provide a battery module, a battery, an electrical device, and a method for manufacturing the battery module.

[0054] like Figure 1 , Figure 2 and Figure 3 As shown, the battery module includes foam 100 and battery cells 200. The foam 100 is provided with a plurality of battery cell holes 110. The battery cell holes 110 penetrate the foam 100. The side walls of the battery cell holes 110 are provided with an anti-slip coating 300. The battery cells 200 are installed in the battery cell holes 110 one by one and contact the anti-slip coating 300.

[0055] The battery hole 110 is used to insert the battery 200 and fix the battery 200. The battery hole 110 can be a shape that matches the outer wall of the battery, for example, it can be cylindrical. One or both ends of the battery hole 110 can also be set to a trumpet shape to facilitate the insertion of the battery 200 into the battery hole 110.

[0056] The anti-slip coating 300 not only needs to fix the battery cell 200, but also cannot damage the battery cell 200. Therefore, the anti-slip coating 300 can be selected from a soft material with a certain elasticity. For example, the anti-slip coating 300 can be a silicone coating, and / or a plastic coating, and / or a rubber coating, etc.

[0057] In terms of the molding process, the anti-slip coating 300 can be fixed to the side wall of the battery cell cavity 110 by spraying or gluing.

[0058] In addition, the anti-slip coating 300 can completely cover the side walls of the battery cell cavity 110, or partially cover the side walls of the battery cell cavity 110. When the anti-slip coating 300 partially covers the side walls of the battery cell cavity 110, the anti-slip coating 300 can form regular stripes or stripes on the side walls of the battery cell cavity 110, or it can be an irregular pattern, and the embodiments of the present application are not limited to this.

[0059] Optionally, the anti-slip coating 300 is evenly distributed at multiple locations on the inner wall of the battery cell cavity 110 , and the multiple anti-slip coatings 300 are not connected to each other, so that the battery cell 200 is fixed at multiple positions of the battery cell 200 to better play an anti-slip role.

[0060] Optionally, the thickness of the anti-slip coating 300 is 1 mm-3 mm. If the thickness of the anti-slip coating 300 is less than 1 mm, the anti-slip effect will be greatly reduced, and if the thickness of the anti-slip coating 300 is greater than 3 mm, the space occupied by the anti-slip coating 300 is too large. Therefore, the thickness of the anti-slip coating 300 is within the above range, which saves space while ensuring the anti-slip effect of the anti-slip coating 300.

[0061] Therefore, the battery module of the above structure has the following advantages:

[0062] First, the foam 100 is used instead of the foam glue. The foam 100 has a good flame retardant effect, can reduce the speed of heat transfer and spread between the multiple battery cells 200, reduce the probability of thermal runaway of the battery module, and improve the safety of the battery module.

[0063] Secondly, the foam is lightweight, which is beneficial to the lightweight design of the battery module.

[0064] Again, an anti-skid coating 300 is provided on the side wall of the battery cell cavity 110. When the battery cell 200 is installed in the battery cell cavity 110, the anti-skid coating 300 can play an anti-skid role and prevent the battery cell 200 from rotating in the battery cell cavity 110 or moving along the depth direction of the battery cell cavity 110, thereby fixing the battery cell 200, making the structural stability of the battery module higher, the tabs are not easy to tear, and the electrical performance of the battery module is more stable.

[0065] In some embodiments, the depth of the battery cell cavity 110 is less than the height of the battery cell 200, the upper end surface of the battery cell 200 is higher than the upper end surface of the battery cell cavity 110, and the lower end surface of the battery cell 200 is lower than the lower end surface of the battery cell cavity 110; the upper end surface of the battery cell 200 is the end surface of the battery cell 200 where the pole is provided, and the upper end surface of the battery cell cavity 110 is the end surface of the battery cell cavity 110 close to the upper end surface of the battery cell 200.

[0066] It is understandable that the surface of the battery cell 200 without the pole is the lower end surface of the battery cell 200 , and the lower end surface of the battery cell cavity 110 is the surface of the battery cell cavity 110 close to the lower end surface of the battery cell 200 .

[0067] By adopting the above solution, the two end faces and part of the side faces of the battery cell 200 are not wrapped by the foam 100 , so that the heat of the battery cell 200 can be released from the unwrapped parts.

[0068] In addition, the upper end surface of the battery cell 200 is higher than the upper end surface of the battery cell cavity 110, and the lower end surface of the battery cell 200 is lower than the lower end surface of the battery cell cavity 110. This can prevent the presence of the foam 100 from interfering with the connection process when other components are connected at both ends of the battery cell 200, thereby facilitating the assembly of the battery module.

[0069] It should be emphasized that in the above scheme, a portion of the side wall of the battery cell 200 near the two end faces is not wrapped by the foam 100, so that the heat of the battery cell 200 can be dissipated through these two parts of the side wall, preventing the heat from continuing to accumulate at any end of the battery cell 200 and causing the local temperature of the battery cell 200 to be too high.

[0070] Optionally, the depth h of the battery cell cavity 110 and the height H of the battery cell 200 satisfy 75%H≤h≤95%H.

[0071] The depth h of the battery cell cavity 110 refers to the distance between the upper end surface and the lower end surface of the battery cell cavity 110 , and the height H of the battery cell 200 refers to the distance between the upper end surface and the lower end surface of the battery cell 200 .

[0072] The above relationship between the depth h of the battery cell cavity 110 and the height H of the battery cell 200 can prevent the shallow depth of the battery cell cavity 110 from causing the foam 100 to be loosely fixed to the battery cell 200, and can also prevent the distance between the end face of the battery cell 200 and the end face of the corresponding side of the battery cell cavity 110 from being too small, causing the connection between the battery cell 200 and other components of the battery module to be limited.

[0073] In some embodiments, the distance between the lower end surface of the battery cell cavity 110 and the lower end surface of the battery cell 200 is smaller than the distance between the upper end surface of the battery cell cavity 110 and the upper end surface of the battery cell 200 .

[0074] During use of the battery module, the lower end of the battery cell 200 is generally arranged downward. Therefore, through the above arrangement, the center of gravity of the battery module is close to the lower half, and the battery module is relatively stable in the box and is not prone to tipping over.

[0075] like Figure 1 As shown, in some embodiments, the battery module further includes a cold plate 500 , and the lower end surface of the battery cell 200 is in contact with the cold plate 500 .

[0076] The cold plate 500 may be a water-cooled plate 500. The cold plate 500 can directly contact the battery cell 200 and take away the heat of the battery cell 200, which is conducive to the rapid dissipation of the heat of the battery cell 200 and further prevents the battery from thermal runaway.

[0077] Please refer to Figure 3 In some embodiments, a thermal conductive coating 400 is provided on the shell of the battery cell 200 , and / or a thermal conductive coating 400 is provided on the side wall of the battery cell cavity 110 , and / or a thermal conductive coating 400 is provided on the anti-slip coating 300 .

[0078] The material of the thermal conductive coating 400 includes at least one of graphene or carbon black.

[0079] When a thermally conductive coating 400 is provided on the outer shell of the battery cell 200, the thermally conductive coating 400 may completely cover the outer shell of the battery cell 200, or partially cover the outer shell of the battery cell 200. The embodiment of the present application is not limited to this. In this case, regardless of the assembly condition of the battery cell 200 and the foam 100, the thermally conductive coating 400 can conduct heat by contacting with the outer shell of the battery cell 200, thereby improving the efficiency of heat dissipation in the battery cell 200.

[0080] A thermal conductive coating 400 is disposed on the side wall of the battery cell cavity 110 , and the contact portion of the battery cell 200 with the thermal conductive coating 400 can transfer heat to the thermal conductive coating 400 , thereby preventing heat accumulation inside the battery cell 200 from causing thermal runaway.

[0081] The thermal conductive coating 400 is disposed on the anti-slip coating 300. When the battery cell 200 is installed in the battery cell cavity 110, the battery cell 200 indirectly contacts the anti-slip coating 300 by contacting the thermal conductive coating 400, which is not only conducive to improving the stability of the position of the battery cell 200, but also conducive to heat dissipation of the battery cell 200. The area of ​​the thermal conductive coating 400 can be smaller than the area of ​​the anti-slip coating 300, and the area of ​​the thermal conductive coating 400 can also be equal to the area of ​​the anti-slip coating 300, which is not limited in the embodiment of the present application.

[0082] By adopting the above scheme, the thermal conductive coating 400 set at the above three positions can all contact the side walls of the battery cell 200, so as to quickly conduct the heat of the battery cell 200, so that the battery cell 200 can be cooled down quickly, preventing high temperature from affecting the electrical performance of the battery cell 200, and reducing the probability of safety accidents such as thermal runaway and heat spread.

[0083] Alternatively, if Figure 3 As shown, the thermal conductive coating 400 is arranged on the side wall of the battery cell cavity 110 and is staggered with the anti-slip coating 300. This arrangement enables the battery cell 200 to directly contact the anti-slip coating 300 and the thermal conductive coating 400, which is further beneficial to the anti-slip and heat dissipation of the battery cell 200.

[0084] In summary, the present application uses foam 100 to fix the battery cell 200. The foam 100 has a good flame retardant effect and is light in weight, which is beneficial to the lightweight design of the battery module. By providing an anti-skid coating 300 on the side wall of the battery cell cavity 110, when the battery cell 200 is installed in the battery cell cavity 110, the anti-skid coating 300 can play an anti-skid role, preventing the battery cell 200 from rotating in the battery cell cavity 110 or moving along the depth direction of the battery cell cavity 110, thereby fixing the battery cell 200, so that the structural stability of the battery module is higher and the electrical performance is more stable.

[0085] The present application also provides a method for manufacturing a battery module, which is used to manufacture the battery module in any of the above embodiments. Figure 4 As shown, the method specifically includes:

[0086] S100: providing a foam 100, processing a plurality of battery cell holes 110 on the foam 100, wherein the battery cell holes 110 penetrate the foam 100.

[0087] S200: providing an anti-skid material, and setting the anti-skid material on the side wall of the battery cell cavity 110 to form an anti-skid coating 300.

[0088] S300: providing battery cells 200, installing the battery cells 200 in the battery cell cavities 110 one by one, and making the battery cells 200 contact with the anti-slip coating 300.

[0089] The order of the above steps is not necessarily in accordance with the above arrangement order. In the actual process of manufacturing the battery module, the order of the above steps can be adjusted according to the actual situation, or performed simultaneously, or other steps can be added to manufacture other components of the battery module to finally obtain the required battery module. Please refer to the embodiment of the battery module part for details.

[0090] In addition, any method that can manufacture related components and connect related components falls within the protection scope of the embodiments of the present application, and the embodiments of the present application will not be described in detail here.

[0091] By adopting the above scheme, the position of the battery cell hole 110 on the foam 100 is the installation position of the battery cell 200, and the foam 100 can fix multiple battery cells 200, and the fixing method is simpler. Anti-skid material is set on the side wall of the battery cell hole 110 to form an anti-skid coating 300. When the battery cell 200 is installed in the battery cell hole 110, the anti-skid coating 300 can play an anti-skid role, preventing the battery cell 200 from rotating in the battery cell hole 110 or moving along the depth direction of the battery cell hole 110, thereby fixing the battery cell 200, so that the structural stability of the battery module is higher and the electrical performance is more stable. The foam 100 is used to fix the battery cell 200. The foam 100 has a good flame retardant effect and is light in weight, which is conducive to the lightweight design of the battery module.

[0092] Optionally, in S200 , the size of the battery cell cavity 110 provided with the anti-slip coating 300 in any direction perpendicular to the depth direction is smaller than the size of the battery cell 200 in the corresponding direction.

[0093] Taking the battery cell 200 as a cylindrical battery cell as an example, the battery cell cavity 110 is a circular hole, the battery cell cavity 110 provided with the anti-slip coating 300 is substantially in the shape of a circular hole, and the depth direction of the battery cell cavity 110 is the radial direction of the battery cell cavity 110. Exemplarily, the diameter of the battery cell 200 is 50 mm, and the diameter of the battery cell cavity 110 provided with the anti-slip coating 300 before the battery cell 200 is installed is 49 mm.

[0094] With such arrangement, when the battery cell 200 is inserted into the battery cell cavity 110, a transition fit or an interference fit is formed between the battery cell cavity 110 and the battery cell 200, and the battery cell 200 is tightly clamped and restrained by the side wall of the battery cell cavity 110, and is not prone to shaking or rotating. The structure of the battery module is more stable, and the tabs are not prone to tearing.

[0095] Optionally, the material of the anti-slip coating 300 is a temperature-variable material, for example, the temperature-variable material may be a denatured silica gel, which has a smaller volume at low temperatures and a larger size at room temperature or high temperature.

[0096] The step of installing the battery cell 200 into the battery cell cavity 110 can be performed in a relatively low temperature environment. At this time, the volume of the anti-slip coating 300 is relatively small, and the diameter of the battery cell cavity 110 is relatively large, so it is convenient for the battery cell 200 to be installed into the battery cell cavity 110. After the battery cell 200 is installed into the battery cell cavity 110, the entire assembly consisting of the foam 100 and the battery cell 200 is moved to a normal temperature environment, and the anti-slip coating 300 changes temperature and increases in volume, thereby clamping the battery cell 200.

[0097] It can be seen that the above arrangement can not only improve the structural stability of the foam 100 and the battery cell 200 after assembly, but also take into account the ease of assembly between the battery cell 200 and the foam 100, thereby improving the assembly efficiency of the battery module.

[0098] Those skilled in the art will appreciate that, although some embodiments herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present application and form different embodiments. For example, in the claims, any one of the claimed embodiments may be used in any combination.

[0099] As described above, 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 make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery module, characterized in that: include: Foam, wherein a plurality of battery core holes are arranged on the foam, the battery core holes penetrate the foam, and the side walls of the battery core holes are provided with an anti-slip coating; The battery cells are installed in the battery cell holes one by one and in contact with the anti-slip coating.

2. The battery module according to claim 1, characterized in that: The depth of the battery cell cavity is less than the height of the battery cell, the upper end surface of the battery cell is higher than the upper end surface of the battery cell cavity, and the lower end surface of the battery cell is lower than the lower end surface of the battery cell cavity; The upper end surface of the battery cell is the end surface of the battery cell provided with the pole, and the upper end surface of the battery cell hole is the end surface of the battery cell hole close to the upper end surface of the battery cell.

3. The battery module according to claim 2, characterized in that: The distance between the lower end surface of the battery cell hole and the lower end surface of the battery cell is smaller than the distance between the upper end surface of the battery cell hole and the upper end surface of the battery cell.

4. The battery module according to claim 2, characterized in that: The depth h of the battery cell cavity and the height H of the battery cell satisfy 75%H≤h≤95%H.

5. The battery module according to claim 1, characterized in that: The thickness of the anti-slip coating is 1mm-3mm.

6. The battery module according to any one of claims 1 to 5, characterized in that: A cold plate is also included, and the lower end surface of the battery cell is in contact with the cold plate.

7. The battery module according to any one of claims 1 to 5, characterized in that: The shell of the battery cell is provided with a thermal conductive coating, and / or, The side wall of the battery core cavity is provided with a thermal conductive coating, and / or, A heat-conducting coating is provided on the anti-slip coating.

8. A battery, characterized in that: A battery module comprising any one of claims 1 to 7.

9. An electrical device, characterized in that: Comprising the battery as claimed in claim 8.

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