Battery module, battery and electric equipment
By providing side cold components in the battery module interspersed between the battery cells and contacting their side walls in multiple points, the problem of battery heat dissipation is solved, and the circulation performance of the battery and the life of the module are improved.
Patent Information
- Application Number
- CN202421460056.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-24
- Publication Date
- 2025-04-29
- Estimated Expiration
- 2034-06-24
AI Technical Summary
The heat generated by the battery during charging and discharging is difficult to effectively dissipate, resulting in uneven temperatures and affecting the cycling performance and life of the battery.
A battery module is designed in which the side cooling assembly is interspersed between a plurality of battery cells and contacts the side walls of any one battery cell in at least two different directions to ensure that heat can be effectively transmitted and dispersed.
By reducing the temperature differences in different parts of the battery cell, the cycle performance of the battery and the life of the module are improved, while miniaturizing the battery design.
Smart Images
Figure CN222813705U_ABST
Abstract
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] The battery will generate a lot of heat during the charging and discharging process. If the heat cannot be discharged in time, the temperature inside the battery will continue to rise. Batteries are often very sensitive to temperature changes. The rising temperature inside the battery will put the battery in a high-temperature working environment, affecting the battery's cycle performance.
[0003] Generally, batteries will produce different side reactions at different temperatures. For example, in areas with higher temperatures, the electrolyte decomposes and produces more gas, which affects the battery's cycle performance. In areas with lower temperatures, lithium deposition is more likely to occur.
[0004] In the related art, a cold plate is provided in the battery module. However, since the contact area between the cold plate and the battery cell is small, even for the same battery cell, the temperature difference between different parts may be large. For example, for the same battery cell, the temperature of the part close to the cold plate is lower, and the temperature of the part far from the cold plate is higher. In addition, there is a large temperature difference between the high temperature part and the low temperature part. As a result, the lithium insertion and extraction kinetics on both sides of the battery cell are greatly different, the electrode consistency is poor, and cycle diving is prone to occur. Utility Model Content
[0005] In view of the above problems, the embodiments of the present application provide a battery module, a battery and an electrical device, which can reduce the temperature difference between different parts in the battery module and improve the cycle performance of the battery.
[0006] According to a first aspect of an embodiment of the present application, a battery module is provided, comprising: a plurality of battery cells and a side cooling assembly, wherein the side cooling assembly is interspersed between the plurality of battery cells, and the side cooling assembly contacts the side wall of any battery cell in at least two different directions.
[0007] By adopting the above scheme, the side wall of the battery cell is in contact with the side cooling assembly in at least two directions, so that the heat generated by the battery cell can be transmitted to the side cooling assembly through any of the above contact positions. The side cooling assembly is interspersed between multiple battery cells, and the side cooling assembly is generally set in the gap between adjacent battery cells. At this position, even if the side cooling assembly does not contact the battery cell, it is generally close to the battery cell. The heat of the part of the battery cell that is not in contact with the side cooling assembly can be transferred to the position of the side cooling assembly that is close to the part, thereby reducing the heat accumulation of the battery cell due to the distance between the local part and the side cooling assembly, reducing the temperature difference between different parts of the battery cell, improving the cycle performance of the battery cell, and thereby improving the life of the battery module.
[0008] In some embodiments, the battery module is divided into multiple side cooling areas along the height direction of multiple battery cells; the side cooling assembly includes multiple side cooling plates, each side cooling plate is located in a different side cooling area and is interspersed between multiple battery cells, and different side cooling plates contact the side wall of any battery cell in different directions.
[0009] By adopting the above solution, each side cold plate is inserted between multiple battery cells in the corresponding side cold area, so that there will be no interference between the multiple side cold plates, and the same position of the battery cell will not correspond to multiple side cold plates in the same direction, resulting in an increase in the gap between the battery cells. Therefore, the structure of the above battery module is reasonably set, while ensuring the heat dissipation performance of the battery module, the space occupied by the side cold plate is reduced, thereby reducing the volume of the battery module, which is conducive to the miniaturization design of the battery.
[0010] In some embodiments, there is a gap between two adjacent side cold plates in the height direction of the battery cell.
[0011] By adopting the above solution, the risk of mutual interference between two adjacent side cold plates is reduced, the material of the side cold plates is saved, and the battery module can be prevented from being damaged by friction and compression between multiple side cold plates during use. The heat of the side wall of the battery cell corresponding to the gap can be transferred to any side cold plate that is closer to it, reducing heat accumulation.
[0012] In some embodiments, the upper end surface of the battery cell is higher than the upper end surface of any one of the side cold plates, and the lower end surface of the battery cell is lower than the lower end surface of any one of the side cold plates.
[0013] By adopting the above solution, the two end faces of the battery cell and part of the side wall near the two end faces are not provided with side cold plates, and the heat of the part of the battery cell without side cold plates can be transferred to the side cold plates closer to reduce heat accumulation. In addition, when other components are connected at both ends of the battery cell, interference between other components and the side cold plates can be avoided, which facilitates the assembly of the battery module.
[0014] In some embodiments, the sum of the heights of the plurality of side cold plates in the height direction of the battery cell is h, the height of the battery cell is H, and h and H satisfy: 40%H≤h≤80%H.
[0015] By adopting the above solution, it is possible to prevent the side cooling plate from being too small in the height direction of the battery cell, resulting in insufficient contact between the side cooling plate and the battery cell, making it difficult for the heat of the battery cell to dissipate, and to prevent the side cooling plate from being too large in the height direction of the battery cell, resulting in the side cooling plate and the end face of the battery cell being too close, affecting the connection of other battery module components on the end face of the battery cell. Therefore, the layout of multiple battery cells and the side cooling assembly is compact and the structure is reasonable.
[0016] In some embodiments, the battery module further includes a bottom cold plate, which contacts the upper end surfaces and / or lower end surfaces of the plurality of battery cells.
[0017] By adopting the above solution, the bottom cold plate can take away the heat of the battery cell by directly contacting the upper end surface and / or the lower end surface of the battery cell, which is further conducive to the heat dissipation of the battery cell.
[0018] In some embodiments, a heat conductive layer is disposed outside the side wall of the battery cell.
[0019] By adopting the above solution, the heat of the battery cell can be transferred out through the heat-conducting layer, which is further beneficial for transferring the heat of the battery cell to the side cooling component.
[0020] In some embodiments, the material of the thermal conductive layer includes graphene and / or carbon black.
[0021] By adopting the above scheme, in a battery in which the side wall of the battery cell serves as the negative electrode, the thermal conductive layer containing graphene and / or carbon black can not only conduct heat, but also reduce the resistance of the side wall, so that the negative electrode can transfer more electrons and improve the conductivity of the battery module.
[0022] According to a second aspect of the embodiments of the present application, a battery is provided, comprising the battery module in any of the above embodiments.
[0023] According to a third aspect of the embodiments of the present application, a battery module is provided, comprising the battery in the above embodiments.
[0024] In the embodiment of the present application, the side cooling assembly is in contact with the side wall of any battery cell in at least two different directions, so that the side wall of the battery cell is in contact with the side cooling assembly in at least two directions, so that the heat generated by the battery cell can be transmitted to the side cooling assembly through any of the above contact positions. The side cooling assembly is interspersed between multiple battery cells, so that the heat of the part of the battery cell that is not in contact with the side cooling assembly can be transferred to the part of the side cooling assembly that is closer to the part, thereby reducing the heat accumulation of the battery cell due to the distance between the part and the side cooling assembly, reducing the temperature difference between different parts of the battery cell, improving the cycle performance of the battery cell, and thus improving the life of the battery module.
[0025] 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
[0026] 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.
[0027] Figure 1 1 is a top view of the battery module in the embodiment of the present application.
[0028] Figure 2 It is a partial side view of the battery module in the embodiment of the present application.
[0029] Figure 3 It is a top view of a battery cell in an embodiment of the present application.
[0030] Explanation of the reference numerals: 100, battery cell; 200, side cooling assembly; 210, side cooling plate; 211, first side cooling plate; 212, second side cooling plate; 300, side cooling area; 310, first side cooling area; 320, second side cooling area; 400, bottom cooling plate; 500, heat conducting layer. DETAILED DESCRIPTION
[0031] 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.
[0032] 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.
[0033] 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.
[0034] 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.
[0035] 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.
[0036] 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.
[0037] 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.
[0038] 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.
[0039] 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).
[0040] 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 can refer to a physical connection. For example, the physical connection can 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 can also be a detachable connection, such as a mutual snap connection or snap connection; the physical connection can 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 can refer to not only a physical connection, but also an electrical connection or a signal connection. For example, it can be a direct connection, that is, a physical connection, or it can be indirectly connected through at least one intermediate element, as long as the circuit is connected, and it can also be the internal connection of two elements; in addition to signal connection through a circuit, a signal connection can also refer to signal connection through a media medium, such as a radio wave. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0041] The present invention discloses a battery module, a battery and an electric device, 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 device, 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 device may be a carousel, a jumping machine, etc. This application does not impose any special restrictions on the above-mentioned electrical equipment.
[0042] For new energy vehicles, the above batteries can be used as a driving power source, thereby replacing fossil fuels to provide driving power.
[0043] The battery may include the battery module, wherein each battery module includes a plurality of battery cells, the plurality of battery cells may be connected in series and / or in parallel, and form a battery module with a module management system, and then the plurality of battery modules may be electrically connected in series, in parallel, or in a combination of series and parallel, and together with the battery management system form a battery.
[0044] The battery cell may be a lithium ion battery, a sodium ion battery or a magnesium ion battery, and its outer contour may be a cylinder, a flat body, a cuboid or other shapes, but is not limited thereto. Specifically in this embodiment, the battery cell is a cylindrical battery.
[0045] 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.
[0046] When the battery is working, both the battery cell and the busbar component used to connect multiple battery cells will generate heat. Among them, the battery cell is a sealed component, so the heat it generates is often sealed in the battery cell shell and needs to be slowly dissipated through the shell. If the heat is generated too quickly and has no time to dissipate, the temperature of the battery cell will be too high. The temperature will not only affect the capacity of the battery, but also the safety performance of the battery. For example, when the temperature is too low, the capacity of the battery will decrease, and when the temperature is too high, the battery may experience thermal runaway, causing safety problems.
[0047] In addition, the battery will produce different side reactions at different temperatures. For example, in areas with higher temperatures, the electrolyte decomposes and produces more gas, which affects the battery's cycle performance. In areas with lower temperatures, lithium deposition is more likely to occur.
[0048] In the related art, a cold plate is provided in the battery module. However, since the contact area between the cold plate and the battery cell is small, even for the same battery cell, the temperature difference between different parts may be large. For example, for the same battery cell, the temperature of the part close to the cold plate is lower, and the temperature of the part far from the cold plate is higher. In addition, there is a large temperature difference between the high temperature part and the low temperature part. As a result, the lithium insertion and extraction kinetics on both sides of the battery cell are greatly different, the electrode consistency is poor, and cycle diving is prone to occur.
[0049] In view of the above problems, the embodiments of the present application provide a battery module, a battery and an electrical device.
[0050] like Figure 1 As shown, the battery module includes a plurality of battery cells 100 and a side cooling assembly 200 . The side cooling assembly 200 is interspersed between the plurality of battery cells 100 , and the side cooling assembly 200 contacts the side wall of any battery cell 100 in at least two different directions.
[0051] The cooling method of the battery cell 100 by the side cooling assembly 200 may be liquid cooling, cold air cooling or other methods, which is not limited in the embodiment of the present application.
[0052] The side cooling assembly 200 is inserted between the plurality of battery cells 100 , which means that the side cooling plate 210 assembly is bent and extends in the gaps between the adjacent battery cells 100 .
[0053] It can be understood that when the side cooling assembly 200 is inserted between multiple battery cells 100, it must bend around the outer contour of the side wall of the battery cell 100, thereby making the structure of the battery module compact. Under this structure, even if the side cooling assembly 200 does not contact the battery cell 100, it is generally close to the battery cell 100. The heat of the part of the battery cell 100 that is not in contact with the side cooling assembly 200 can be transferred to the position of the side cooling assembly 200 that is closer to this part.
[0054] The side cooling assembly 200 contacts the side wall of any battery cell 100 in at least two different directions, that is, the side wall of the battery cell 100 contacts the side cooling assembly 200 in at least two directions, so that the heat generated by the battery cell 100 can be transferred to the side cooling assembly 200 through any of the above-mentioned contact positions.
[0055] Compared with the method of only setting a cold plate on one side of the battery cell 100 in the related art, the side cooling assembly 200 in the embodiment of the present application has more contact positions with the battery cell 100, and different contact positions are located on different sides of the battery cell 100, thereby greatly shortening the distance between the battery cell 100 and the farthest part of the side cooling assembly 200, making it easier for the heat generated by the battery cell 100 to be transferred to the side cooling assembly 200, reducing the heat accumulation of the battery cell 100 due to the long distance between the local part of the battery cell 100 and the side cooling assembly 200, reducing the temperature difference between different parts of the battery cell 100, improving the cycle performance of the battery cell 100, and thereby improving the life and safety of the battery module.
[0056] For example, the battery module includes a plurality of battery cells 100, the poles of each battery cell 100 face the same direction, a cylindrical region is formed on the side cooling assembly 200, and the battery cells 100 are fixed in the cylindrical region. In this way, each battery cell 100 is surrounded by the side cooling assembly 200, so that heat can be better transferred to the side cooling assembly 200.
[0057] like Figure 2 As shown, in some embodiments, the battery module is divided into multiple side cooling areas 300 along the height direction of the multiple battery cells 100; the side cooling assembly 200 includes multiple side cooling plates 210, each side cooling plate 210 is located in a different side cooling area 300, and is interspersed between the multiple battery cells 100, and different side cooling plates 210 contact the side wall of any battery cell 100 in different directions.
[0058] For example, Figure 2As shown, the battery module is divided into two side cooling areas 300 along the height direction of the plurality of battery cells 100, namely, a first side cooling area 310 and a second side cooling area 320. The first side cooling area 310 is located above the second side cooling area 320. Accordingly, two side cooling plates 210 are also provided, namely, a first side cooling plate 211 and a second side cooling plate 212. The first side cooling plate 211 is located in the first side cooling area 310 and surrounds different battery cells 100 in an "S" shape along the outer contour of the battery cell 100. The second side cooling plate 212 is located in the second side cooling area 320 and surrounds different battery cells 100 in an "S" shape along the outer contour of the battery cell 100. In the process of surrounding, the first side cooling plate 211 and the second side cooling plate 212 contact the side wall of the same battery cell 100 in different directions.
[0059] Please refer to Figure 2 In some embodiments, two adjacent side cold plates 210 are located on different sides of any battery cell 100. For example, in the above example, for any battery cell 100, when the first side cold plate 211 is located on the front side of the battery cell 100, the second side cold plate 212 is located on the rear side of the battery cell 100.
[0060] Optional, such as Figure 1 and Figure 2 As shown, when the first side cold plate 211 and the second side cold plate 212 are both wrapped around different battery cells 100 in an "S" shape, the wrapping directions of the two side cold plates 210 are opposite. Exemplarily, for two adjacent battery cells 100, when the first side cold plate 211 is located at the front side of one battery cell 100 and the second side cold plate 212 is located at the rear side of the battery cell 100, the first side cold plate 211 is located at the rear side of the other battery cell 100 and the second side cold plate 212 is located at the front side of the other battery cell 100.
[0061] By adopting the above solution, each side cold plate 210 is interspersed between multiple battery cells 100 in the corresponding side cooling area 300, so that there is no interference between the multiple side cold plates 210, and the same position of the battery cell 100 does not correspond to multiple side cold plates 210 in the same direction. Therefore, there is no need to increase the gap between two adjacent battery cells 100 to accommodate multiple side cold plates 210. Therefore, the structure of the above battery module is reasonably set, while ensuring the heat dissipation performance of the battery module, the space occupied by the side cold plate 210 is reduced, thereby reducing the volume of the battery module, which is conducive to the miniaturization design of the battery.
[0062] Alternatively, if Figure 1As shown, the battery module may include multiple rows of battery cells 100, each row of battery cells 100 includes multiple battery cells 100, and the same side cooling area 300 of each row of battery cells 100 shares a side cooling plate 210, so that the shape of the side cooling plate 210 only needs to adapt to the layout of one row of battery cells 100, and does not need to adapt to the layout of other rows of battery cells 100, and the shape and molding process of the side cooling plate 210 are simpler.
[0063] like Figure 2 As shown, in some embodiments, there is a gap between two adjacent side cold plates 210 in the height direction of the battery cell 100 .
[0064] This arrangement can reduce the risk of mutual interference between two adjacent side cold plates 210, save the material of the side cold plates 210, and prevent the battery module from being damaged by friction and compression between multiple side cold plates 210 during use. The heat of the side wall of the battery cell 100 corresponding to the gap can be transferred to any side cold plate 210 that is closer, reducing heat accumulation.
[0065] like Figure 2 As shown, in some embodiments, the upper end surface of the battery cell 100 is higher than the upper end surface of any side cold plate 210 , and the lower end surface of the battery cell 100 is lower than the lower end surface of any side cold plate 210 .
[0066] The upper end surface of the battery cell 100 is the end surface where the pole is located, and the lower end surface of the battery cell 100 is the end surface opposite to the upper end surface.
[0067] By adopting the above solution, the two end faces of the battery cell 100 and part of the side wall near the two end faces are not provided with side cooling plates 210, and the heat of the parts of the battery cell 100 without side cooling plates 210 can be transferred to the side cooling plates 210 that are closer, reducing heat accumulation.
[0068] In addition, when other components are connected to both ends of the battery cell 100 , the above arrangement can prevent the other components from interfering with the side cold plate 210 , thereby facilitating the assembly of the battery module.
[0069] In some embodiments, the sum of the heights of the plurality of side cold plates 210 in the height direction of the battery cell 100 is h, the height of the battery cell 100 is H, and h and H satisfy: 40%H≤h≤80%H.
[0070] If the side cold plate 210 is too small in the height direction of the battery cell 100 , it is easy to cause insufficient contact between the side cold plate 210 and the battery cell 100 , and the heat of the battery cell 100 is difficult to dissipate.
[0071] If the side cold plate 210 is too large in the height direction of the battery cell 100 , it is easy for the side cold plate 210 to be too close to the end face of the battery cell 100 or to exceed the plane where the end face is located, affecting the connection of other components of the battery module on the end face of the battery cell 100 .
[0072] By controlling 40%H≤h≤80%H, the layout of multiple battery cells 100 and the side cooling assembly 200 is compact and the structure is reasonable, while ensuring that the heat of the battery cells 100 can be easily transferred to the side cooling plate 210, the influence of the side cooling plate 210 on other components of the battery module is reduced or even avoided.
[0073] like Figure 2 As shown, in some embodiments, the battery module further includes a bottom cold plate 400 , and the bottom cold plate 400 is in contact with the upper end surfaces and / or lower end surfaces of the plurality of battery cells 100 .
[0074] The bottom cold plate 400 can be arranged at one end of the battery module and only contact the lower end surface of the battery cell 100. The bottom cold plate 400 can also be arranged at one end of the battery module and only contact the upper end surface of the battery cell 100. Two bottom cold plates 400 can also be provided, which are respectively located at the upper end and the lower end of the battery cell 100 and respectively contact the upper end surface and the lower end surface of the battery cell 100. The embodiments of the present application are not limited to this.
[0075] By adopting the above solution, the bottom cold plate 400 can take away the heat of the battery cell 100 by directly contacting the upper end surface and / or the lower end surface of the battery cell 100 , which is further conducive to the heat dissipation of the battery cell 100 .
[0076] like Figure 3 As shown, in some embodiments, a heat conductive layer 500 is disposed outside the side wall of the battery cell 100 .
[0077] The heat conductive layer 500 may completely cover the side wall of the battery cell 100 , or may partially cover the side wall of the battery cell 100 , and this embodiment of the present application does not limit this.
[0078] In addition, the heat-conducting layer 500 may be a heat-conducting coating, a heat-conducting veneer, or other forms of heat-conducting layer 500, which is not limited in the embodiments of the present application.
[0079] By adopting the above solution, the heat of the battery cell 100 can be transferred out through the heat-conducting layer 500 , which is further beneficial for transferring the heat of the battery cell 100 to the side cooling assembly 200 .
[0080] In some embodiments, the material of the heat conductive layer 500 includes graphene and / or carbon black.
[0081] By adopting the above solution, in a battery in which the side wall of the battery cell 100 serves as the negative electrode, the thermal conductive layer 500 containing graphene and / or carbon black can not only conduct heat, but also reduce the resistance of the side wall, so that the negative electrode can transfer more electrons, thereby improving the conductivity of the battery module.
[0082] An embodiment of the present application also provides a battery, comprising the battery module in any of the above embodiments.
[0083] According to an embodiment of the present application, a battery module is also provided, comprising the battery in the above embodiment.
[0084] In summary, the embodiment of the present application makes the side cooling assembly 200 contact the side wall of any battery cell 100 in at least two different directions, so that the side wall of the battery cell 100 contacts the side cooling assembly 200 in at least two directions, so that the heat generated by the battery cell 100 can be transmitted to the side cooling assembly 200 through any of the above contact positions. The side cooling assembly 200 is interspersed between multiple battery cells 100, so that the heat of the part of the battery cell 100 that is not in contact with the side cooling assembly 200 can be transferred to the part of the side cooling assembly 200 that is closer to the part, thereby reducing the heat accumulation of the battery cell 100 due to the distance between the part and the side cooling assembly 200, reducing the temperature difference between different parts of the battery cell 100, improving the cycle performance of the battery cell 100, and thus improving the life of the battery module.
[0085] 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.
[0086] The embodiments described above 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, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. 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: Multiple battery cells; The side cooling assembly is interspersed between the plurality of battery cells, and the side cooling assembly contacts the side wall of any one of the battery cells in at least two different directions.
2. The battery module according to claim 1, characterized in that: The battery module is divided into a plurality of side cooling areas along the height direction of the plurality of battery cells; The side cooling assembly includes a plurality of side cooling plates, each of which is located in a different side cooling area and inserted between a plurality of battery cells, and different side cooling plates contact the side wall of any battery cell in different directions.
3. The battery module according to claim 2, characterized in that: In the height direction of the battery cell, there is a gap between two adjacent side cold plates.
4. The battery module according to claim 2, characterized in that: The upper end surface of the battery cell is higher than the upper end surface of any one of the side cold plates, and the lower end surface of the battery cell is lower than the lower end surface of any one of the side cold plates.
5. The battery module according to claim 2, characterized in that: The sum of the heights of the plurality of side cold plates in the height direction of the battery cell is h, the height of the battery cell is H, and h and H satisfy: 40%H≤h≤80%H.
6. The battery module according to any one of claims 1 to 5, characterized in that: A bottom cold plate is also included, and the bottom cold plate is in contact with the upper end surfaces and / or lower end surfaces of the plurality of battery cells.
7. The battery module according to any one of claims 1 to 5, characterized in that: A heat-conducting layer is disposed outside the side wall of the battery cell.
8. The battery module according to claim 7, characterized in that: The material of the heat conducting layer includes graphene and / or carbon black.
9. A battery, characterized in that: A battery module comprising any one of claims 1 to 8.
10. An electrical device, characterized in that: A battery comprising the battery of claim 9.